Commit df54b52c authored Dec 06, 2005 by Josh Boyer Committed by David Woodhouse May 17, 2006

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>

parent ba9627b8

drivers/mtd/chips/cfi_cmdset_0001.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;