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| author | Grant Likely <grant.likely@secretlab.ca> | 2008-12-21 02:54:28 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2008-12-21 02:54:28 -0700 |
| commit | aaab5e83c2c25d94f7409bdc947a5cc383514e15 (patch) | |
| tree | 929571b5bf2728ac8494b56d0c4965b2aaa47da8 /arch/powerpc/sysdev/bestcomm/ata.c | |
| parent | e4efe3c271c5498ffe7e167eaff01514be2b9a77 (diff) | |
| download | kernel_samsung_smdk4412-aaab5e83c2c25d94f7409bdc947a5cc383514e15.zip kernel_samsung_smdk4412-aaab5e83c2c25d94f7409bdc947a5cc383514e15.tar.gz kernel_samsung_smdk4412-aaab5e83c2c25d94f7409bdc947a5cc383514e15.tar.bz2 | |
powerpc/mpc5200: Disable bestcomm prefetching when ATA DMA enabled
When ATA DMA is enabled, bestcomm prefetching does not work. This
patch adds a function to disable bestcomm prefetch when the ATA
Bestcomm task is initialized.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc/sysdev/bestcomm/ata.c')
| -rw-r--r-- | arch/powerpc/sysdev/bestcomm/ata.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/ata.c b/arch/powerpc/sysdev/bestcomm/ata.c index 1f5258f..901c9f9 100644 --- a/arch/powerpc/sysdev/bestcomm/ata.c +++ b/arch/powerpc/sysdev/bestcomm/ata.c @@ -61,6 +61,9 @@ bcom_ata_init(int queue_len, int maxbufsize) struct bcom_ata_var *var; struct bcom_ata_inc *inc; + /* Prefetch breaks ATA DMA. Turn it off for ATA DMA */ + bcom_disable_prefetch(); + tsk = bcom_task_alloc(queue_len, sizeof(struct bcom_ata_bd), 0); if (!tsk) return NULL; |