From 8eccb26da55a81c0bf0b84dacfb7847755203bab Mon Sep 17 00:00:00 2001 From: Hank Janssen Date: Thu, 5 Aug 2010 19:29:44 +0000 Subject: [PATCH] staging: hv: Fixed bounce kmap problem by using correct index commit 0c47a70a9a8a6d1ec37a53d2f9cb82f8b8ef8aa2 upstream. Fixed bounce offset kmap problem by using correct index. The symptom of the problem is that in some NAS appliances this problem represents Itself by a unresponsive VM under a load with many clients writing small files. Signed-off-by:Hank Janssen Signed-off-by:Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/staging/hv/storvsc_drv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c index d49dc21d4cb4..9eaca784d2a4 100644 --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -532,7 +532,7 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl, ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (srclen) { @@ -593,7 +593,7 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl, destlen = orig_sgl[i].length; ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); - if (j == 0) + if (bounce_addr == 0) bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0); while (destlen) { -- 2.39.5