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| author | Josh Boyer <jdub@us.ibm.com> | 2005-12-06 17:28:19 +0000 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-05-17 01:11:17 +0100 |
| commit | df54b52c411befdcf1d0989f939a49163570ad29 (patch) | |
| tree | e51dbc7a88da164ed1ab6b29273ae01d2faf4025 /drivers/mtd/chips | |
| parent | ba9627b85fcb5ed67285ca0711f0f4d1e965746e (diff) | |
| download | linux-stable-df54b52c411befdcf1d0989f939a49163570ad29.tar.gz linux-stable-df54b52c411befdcf1d0989f939a49163570ad29.tar.bz2 linux-stable-df54b52c411befdcf1d0989f939a49163570ad29.zip | |
CHIPS: Fix potential starvation in cfi_cmdset_0001
The patch below fixes a potential starvation issue that can arise when
there is contention on a chip during a period when a process is
currently writing to it. The starvation is avoided by conditionally
rescheduling when the chip is left in a state usable by other processes.
Signed-off-by: Josh Boyer <jdub@us.ibm.com>
Signed-off-by: Tom Gall <tom_gall@vnet.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0001.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 898c321ab86d..e797752f7c0b 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -1691,6 +1691,11 @@ static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, if (chipnum == cfi->numchips) return 0; } + + /* Be nice and reschedule with the chip in a usable state for other + processes. */ + cond_resched(); + } while (len); return 0; |