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* caif: OMAP HSI: Update path for the header file omap_hsi.hPatrick Combes2014-10-011-1/+1
| | | | | | | | omap_hsi.h has been relocated from arch/arm/plat-omap/include/mach/ folder to arch/arm/plat-omap/include/plat/ Change-Id: I54a08958f5424672a7cf61dc20ac1e63d2d8050c Signed-off-by: Patrick Combes <p-combes@ti.com>
* caif: HSI: Redesing of CAIF HSI glue layer API.Dmitry Tarnyagin2014-10-011-40/+31
| | | | | | | | | | | | | | cfhsi_rx_cancel API entry is created to explicitly cancel pending RX requests (previously was done in cfhsi_down). It is required to correctly handle driver removal when modem is dead. cfhsi_up / cfhsi_down are not more called on every wakeup, but only once at init / deinit. Change-Id: I8170652d3d4c1ffa399e89c77aaecb0f9274da15 Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: hsi: Removing giant lock in caif_hsi code.Dmitry Tarnyagin2014-10-011-24/+19
| | | | | | | | | | | | | cfhsi_tx_frm() was protected by a spin lock. Profiling shown that this spinlock was held 70% of caif_hsi module CPU time and it affected throughput quite a lot. In this commit cfhsi_tx_frm() is redesigned to avoid skb_peek/skb_dequeue pairs which required protection. Change-Id: I6d85bd702279cb0570dd3c7a901a757bab5e9286 Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: hsi: Lock strategy review.Dmitry Tarnyagin2014-10-011-21/+16
| | | | | | | | Expensive spin_lock_irqsave are replaced by more robust spin_lock_bh. Change-Id: I8838afc7cde266bb0710ed8c731585d09556883d Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: hsi: Wakeup link when flushing FIFO.Dmitry Tarnyagin2014-10-011-2/+14
| | | | | | | | | Clock needs to be provided to the HSI block when driver is flushing FIFO. cfhsi_wake_up is used to explicitly request clock. Change-Id: Icc012df6541263f478ae619940f54c6c941c3666 Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* CAIF: HSI: Another method of flushing FIFO.Dmitry Tarnyagin2014-10-011-1/+89
| | | | | | | | | | SW reset was used previously for FIFO flushing in glue layer. It caused problems when CA_DATA, CA_FLAG physical lines were not at the 0 level. SW reset is replaced in this commit by reading of the FIFO at the common layer. Change-Id: Iddc275948e344f1aac161066eb560537bb1f8d4f Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* caif: Fix for a crash on caif_hsi removal.Dmitry Tarnyagin2014-10-011-2/+5
| | | | | | | | | | | | | | | unregister_netdev was called in the begining of deinitialization code to stop data flow from upper layer at early stage, and it freed the driver private struct. The rest of shutdown code used already freed priv causing a crash. Fix stops TXing by netif_tx_stop_all_queues() at the beginning of the deinitialization and finally unregisters the network device at the end. Change-Id: I09165c29dda18c9126dd4b1edb3dc72d0999df1b Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* CAIF: HSI: Driver removal: flush workqueue before notifying the lower layer.Dmitry Tarnyagin2014-10-011-6/+11
| | | | | | | | Fix for warnings and sporadical crashes at driver removal. Change-Id: I681d86b677bb4bcf52c67f549d39c6a265f183e8 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* CAIF: HSI: Fixing a kernel panic at driver removal.Dmitry Tarnyagin2014-10-011-41/+87
| | | | | | | | | | | | | | add_timer was called when timer was already started. Same issue on TX errors. Usage of add_timer is completly replaced by mod_timer(). A flag for shutdown is introduced. No timers nor work items are scheduled when driver is shutting down. Wakelock is always released on exit now. Change-Id: Iad689d9fe322d40cfea09789c4cccc5134ee06f9 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* caif: OMAP HSI: Software reset of HSI blockErwan Bracq2014-10-011-0/+26
| | | | | | | | | | | | | | | New module parameter to perform HSI software reset on interface up. This option should be used only when the modem HSI block is non active: This module parameter (sw_reset_on_cfhsi_up) should be used for: - modem flash operation (mfa) - modem crash dump And should not be used for: - modem flashless boot Change-Id: Ib9a26664c07a22889830a23c9f2e8fe76cbf83f8 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: OMAP: Fix return value of cfhsi_fifo_occupancy().Dmitry Tarnyagin2014-10-011-104/+115
| | | | | | | | | OMAP returns number of words in FIFO while CAIF is expecting to get number of bytes. Change-Id: I60bfae7ee6389860d56161609ac8bae5d953f757 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* CAIF: HSI: Prevent leakage through HSI pins.Dmitry Tarnyagin2014-10-011-37/+22
| | | | | | | | Modem HSI signals need to be set low after the driver removal. Change-Id: I4c65b2b4adbdc97a61b6d48178d302069d054f4d Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* CAIF: HSI phy: Fixing a wrong debug printoutDmitry Tarnyagin2014-10-011-2/+4
| | | | | | | | Printout called from cfhsi_omap_exit() referred to hsi_proto_release(). Change-Id: Ife9895746debd8aa93b2f52e9168be3cd93497aa Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com> Signed-off-by: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com>
* TI caif: Low level physical CAIF driverErwan Bracq2014-10-015-0/+1287
| | | | | | | | | | Low level OMAP specific CAIF driver: - HSI - SPI - Serial with power management. Change-Id: Ib93a26d139a949183b0554c39f0404c91b1606ea Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: HSI physical bearer supportErwan Bracq2014-10-013-0/+1121
| | | | | | | | CAIF over HSI link support. The HSI power management support is also included. Change-Id: I50012b4f9668682154bd997fb9aabf864816eb47 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: SPI module unload fixErwan Bracq2014-10-012-89/+93
| | | | | | | | The caif SPI physical bearer module crash on unload due to bad uninitialization. Change-Id: I9c393014dcce35b1e53f003099c783c2334385cb Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: Serial power management supportErwan Bracq2014-10-013-5/+365
| | | | | | | AWR / CWR handling and serial physical bearer power management support. Change-Id: Ieb6eaa05ef73c96f185c7f0c228f8452542049a2 Signed-off-by: Erwan Bracq <erwan.bracq@stericsson.com>
* caif: fix NULL pointer checkAlan Cox2012-08-091-0/+3
| | | | | | | | | | [ Upstream commit c66b9b7d365444b433307ebb18734757cb668a02 ] Reported-by: <rucsoftsec@gmail.com> Resolves-bug: http://bugzilla.kernel.org/show_bug?44441 Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Revert "tty: make receive_buf() return the amout of bytes received"Linus Torvalds2011-06-041-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit b1c43f82c5aa265442f82dba31ce985ebb7aa71c. It was broken in so many ways, and results in random odd pty issues. It re-introduced the buggy schedule_work() in flush_to_ldisc() that can cause endless work-loops (see commit a5660b41af6a: "tty: fix endless work loop when the buffer fills up"). It also used an "unsigned int" return value fo the ->receive_buf() function, but then made multiple functions return a negative error code, and didn't actually check for the error in the caller. And it didn't actually work at all. BenH bisected down odd tty behavior to it: "It looks like the patch is causing some major malfunctions of the X server for me, possibly related to PTYs. For example, cat'ing a large file in a gnome terminal hangs the kernel for -minutes- in a loop of what looks like flush_to_ldisc/workqueue code, (some ftrace data in the quoted bits further down). ... Some more data: It -looks- like what happens is that the flush_to_ldisc work queue entry constantly re-queues itself (because the PTY is full ?) and the workqueue thread will basically loop forver calling it without ever scheduling, thus starving the consumer process that could have emptied the PTY." which is pretty much exactly the problem we fixed in a5660b41af6a. Milton Miller pointed out the 'unsigned int' issue. Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reported-by: Milton Miller <miltonm@bga.com> Cc: Stefan Bigler <stefan.bigler@keymile.com> Cc: Toby Gray <toby.gray@realvnc.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: make receive_buf() return the amout of bytes receivedFelipe Balbi2011-04-221-2/+4
| | | | | | | | | | | | | it makes it simpler to keep track of the amount of bytes received and simplifies how flush_to_ldisc counts the remaining bytes. It also fixes a bug of lost bytes on n_tty when flushing too many bytes via the USB serial gadget driver. Tested-by: Stefan Bigler <stefan.bigler@keymile.com> Tested-by: Toby Gray <toby.gray@realvnc.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Fix common misspellingsLucas De Marchi2011-03-313-4/+4
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* net: change to new flag variablematt mooney2011-03-171-3/+1
| | | | | | | | | | | Replace EXTRA_CFLAGS with ccflags-y. Signed-off-by: matt mooney <mfm@muteddisk.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Acked-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* Merge branch 'ux500-core' of ↵Russell King2011-01-031-1/+1
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into devel-stable
| * ux500: rename modem IRQ and MBOX filesLinus Walleij2010-12-221-1/+1
| | | | | | | | | | | | | | | | | | | | Suffix the U5500 modem IRQ and MBOX files with *-db5500* so that we clearly know the SoC they belong to, in line with the rest of the files in mach-ux500. Cc: Stefan Nilsson <stefan.xk.nilsson@stericsson.com> Cc: Martin Persson <martin.persson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
* | CAIF: Fix U5500 compile error for shared memory driverKim Lilliestierna XX2010-12-082-2/+2
|/ | | | | | | Rearrange pr_fmt so it compiles. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: caif: spi: fix potential NULL dereferenceVasiliy Kulikov2010-11-181-2/+2
| | | | | | | | alloc_netdev() is not checked here for NULL return value. dev is check instead. It might lead to NULL dereference of ndev. Signed-off-by: Vasiliy Kulikov <segoon@openwall.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: SPI-driver bugfix - incorrect padding.Sjur Brændeland2010-11-032-19/+51
| | | | | Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif-u5500: Build config for CAIF shared mem driverAmarnath Revanna2010-10-272-0/+11
| | | | | Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif-u5500: CAIF shared memory mailbox interfaceAmarnath Revanna2010-10-271-0/+129
| | | | | Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif-u5500: CAIF shared memory transport protocolsjur.brandeland@stericsson.com2010-10-271-0/+744
| | | | | Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* llseek: automatically add .llseek fopArnd Bergmann2010-10-151-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
* caif-driver: add HAS_DMA dependencyHeiko Carstens2010-08-241-1/+1
| | | | | | | | | | | Fix this error on an s390 allyesconfig build: linux-2.6/drivers/net/caif/caif_spi.c:98: undefined reference to `dma_free_coherent' Cc: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif-spi: Bugfix SPI_DATA_POS settings were inverted.Sjur Braendeland2010-08-101-2/+2
| | | | | | | | The setting of SPI_DATA_POS depending on CONFIG_CAIF_SPI_SYNC where inverted. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: handle snprintf() returnDan Carpenter2010-07-261-0/+3
| | | | | | | | | | snprintf() returns the number of bytes that would have been written. It can be larger than the size of the buffer. The current code won't overflow, but people cut and paste this stuff so lets do it right and also make the static checkers happy. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net/caif: Remove unnecessary casts of private_dataJoe Perches2010-07-121-2/+2
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif-driver: Add CAIF-SPI Protocol driver.Sjur Braendeland2010-06-294-0/+1122
| | | | | | | | | | | | | | This patch introduces the CAIF SPI Protocol Driver for CAIF Link Layer. This driver implements a platform driver to accommodate for a platform specific SPI device. A general platform driver is not possible as there are no SPI Slave side Kernel API defined. A sample CAIF SPI Platform device can be found in .../Documentation/networking/caif/spi_porting.txt Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: Kconfig and Makefile fixesSjur Braendeland2010-06-292-12/+3
| | | | | | | | Use "depends on" instead of "if" in Kconfig files. Fixed CAIF debug flag, and removed unnecessary clean-* options. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: Use link layer MTU instead of fixed MTUSjur Braendeland2010-06-201-1/+0
| | | | | | | | | Previously CAIF supported maximum transfer size of ~4050. The transfer size is now calculated dynamically based on the link layers mtu size. Signed-off-by: Sjur Braendeland@stericsson.com Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: add newlines after declarations in caif_serial.cDan Carpenter2010-06-021-0/+9
| | | | | | | | I added newlines after the declarations in caif_serial.c. This is normal kernel style, although I can't see anywhere it's documented. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: remove unneeded variable from caif_net_open()Dan Carpenter2010-06-021-2/+0
| | | | | | | | We don't use the "ser" variable so I've removed it. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: Ldisc add permission check and mem-alloc error checkSjur Braendeland2010-04-281-1/+4
| | | | | | | | | | Changes: o Added permission checks for installing. CAP_SYS_ADMIN and CAP_SYS_TTY_CONFIG can install the ldisc. o Check if allocation of skb was successful. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: tty's are kref objects so take a referenceAlan Cox2010-04-071-1/+2
| | | | | | | I don't think this can be abused in this case but do things properly. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* caif: check write operationsAlan Cox2010-04-071-0/+4
| | | | | | | | write is optional for a tty device. Check that we have a write op rather than calling NULL. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net-caif-driver: add CAIF serial driver (ldisc)Sjur Braendeland2010-03-303-0/+470
Add CAIF Serial driver. This driver is implemented as a line discipline. caif_serial uses the following module parameters: ser_use_stx - specifies if STart of frame eXtension is in use. ser_loop - sets the interface in loopback mode. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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