The patch titled
mtd: maps/physmap: fix oops in suspend/resume/shutdown ops
has been added to the -mm tree. Its filename is
mtd-maps-physmap-fix-oops-in-suspend-resume-shutdown-ops.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mtd: maps/physmap: fix oops in suspend/resume/shutdown ops
From: Anton Vorontsov <cbouatmailru@xxxxxxxxx>
# reboot
...
[ 42.351266] Flash device refused suspend due to active operation (state 0)
[ 42.358195] Unable to handle kernel NULL pointer dereference at virtual address 00000078
[ 42.360060] pgd = c7d9c000
[ 42.362769] [00000078] *pgd=a7d8d031, *pte=00000000, *ppte=00000000
[ 42.372902] Internal error: Oops: 17 [#1]
[ 42.376911] Modules linked in:
[ 42.379980] CPU: 0 Not tainted (2.6.25-rc2-10642-ge8f2594-dirty #73)
[ 42.380000] PC is at physmap_flash_shutdown+0x28/0x54
...
[ 42.380000] Backtrace:
[ 42.380000] [<c0130c1c>] (physmap_flash_shutdown+0x0/0x54) from [<c01207c0>] (platform_drv_shutdown+0x20/0x24)
[ 42.380000] r5:28121969 r4:c0229e08
[ 42.380000] [<c01207a0>] (platform_drv_shutdown+0x0/0x24) from [<c011cd40>] (device_shutdown+0x60/0x88)
[ 42.380000] [<c011cce0>] (device_shutdown+0x0/0x88) from [<c003e8a4>] (kernel_restart_prepare+0x2c/0x3c)
[ 42.380000] r4:00000000
[ 42.380000] [<c003e878>] (kernel_restart_prepare+0x0/0x3c) from [<c003ea00>] (kernel_restart+0x14/0x48)
[ 42.380000] [<c003e9ec>] (kernel_restart+0x0/0x48) from [<c003fdc0>] (sys_reboot+0xe8/0x1f8)
[ 42.380000] r4:01234567
[ 42.380000] [<c003fcd8>] (sys_reboot+0x0/0x1f8) from [<c001aa00>] (ret_fast_syscall+0x0/0x2c)
[ 42.380000] r7:00000058 r6:00000004 r5:00000001 r4:00000000
[ 42.380000] Code: 0a000009 e7953004 e1a00003 e1a0e00f (e593f078)
[ 42.650051] ---[ end trace 6d6c26a0fc3141de ]---
Segmentation fault
INIT: no more processes left in this runlevel
While looping for mtd[i]s, we should stop at the mtd[i] == NULL.
This patch also removes unnecessary "if (info)" checks:
suspend/resume/shutdown ops are executed only if probe() is succeeded, so info
is guaranteed to be !NULL.
Signed-off-by: Anton Vorontsov <cbouatmailru@xxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/maps/physmap.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff -puN drivers/mtd/maps/physmap.c~mtd-maps-physmap-fix-oops-in-suspend-resume-shutdown-ops drivers/mtd/maps/physmap.c
--- a/drivers/mtd/maps/physmap.c~mtd-maps-physmap-fix-oops-in-suspend-resume-shutdown-ops
+++ a/drivers/mtd/maps/physmap.c
@@ -202,9 +202,8 @@ static int physmap_flash_suspend(struct
int ret = 0;
int i;
- if (info)
- for (i = 0; i < MAX_RESOURCES; i++)
- ret |= info->mtd[i]->suspend(info->mtd[i]);
+ for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
+ ret |= info->mtd[i]->suspend(info->mtd[i]);
return ret;
}
@@ -214,9 +213,9 @@ static int physmap_flash_resume(struct p
struct physmap_flash_info *info = platform_get_drvdata(dev);
int i;
- if (info)
- for (i = 0; i < MAX_RESOURCES; i++)
- info->mtd[i]->resume(info->mtd[i]);
+ for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
+ info->mtd[i]->resume(info->mtd[i]);
+
return 0;
}
@@ -225,8 +224,8 @@ static void physmap_flash_shutdown(struc
struct physmap_flash_info *info = platform_get_drvdata(dev);
int i;
- for (i = 0; i < MAX_RESOURCES; i++)
- if (info && info->mtd[i]->suspend(info->mtd[i]) == 0)
+ for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
+ if (info->mtd[i]->suspend(info->mtd[i]) == 0)
info->mtd[i]->resume(info->mtd[i]);
}
#else
_
Patches currently in -mm which might be from cbouatmailru@xxxxxxxxx are
mtd-maps-physmap-fix-oops-in-suspend-resume-shutdown-ops.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
