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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-08-28 21:29:32 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-10-14 13:10:20 +0300
commit33818bbb84cd371b63ed8849cc5264d24c8b3aa2 (patch)
treeecee6a8f02d2d103c6eb33cc6173e74343b1861b /drivers/mtd/ubi/wl.c
parentef6075fbfca9139f428d52d60e671da38aa2e212 (diff)
UBI: allocate memory with GFP_NOFS
Use GFP_NOFS flag when allocating memory on I/O path, because otherwise we may deadlock the filesystem which works on top of us. We observed the deadlocks with UBIFS. Example: VFS->FS lock a lock->UBI->kmalloc()->VFS writeback->FS locks the same lock again. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/wl.c')
-rw-r--r--drivers/mtd/ubi/wl.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 12b25e5b7b8..248ff9e477e 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -508,7 +508,7 @@ int ubi_wl_get_peb(struct ubi_device *ubi, int dtype)
ubi_assert(dtype == UBI_LONGTERM || dtype == UBI_SHORTTERM ||
dtype == UBI_UNKNOWN);
- pe = kmalloc(sizeof(struct ubi_wl_prot_entry), GFP_KERNEL);
+ pe = kmalloc(sizeof(struct ubi_wl_prot_entry), GFP_NOFS);
if (!pe)
return -ENOMEM;
@@ -645,7 +645,7 @@ static int sync_erase(struct ubi_device *ubi, struct ubi_wl_entry *e, int tortur
if (err > 0)
return -EINVAL;
- ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
if (!ec_hdr)
return -ENOMEM;
@@ -768,7 +768,7 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
dbg_wl("schedule erasure of PEB %d, EC %d, torture %d",
e->pnum, e->ec, torture);
- wl_wrk = kmalloc(sizeof(struct ubi_work), GFP_KERNEL);
+ wl_wrk = kmalloc(sizeof(struct ubi_work), GFP_NOFS);
if (!wl_wrk)
return -ENOMEM;
@@ -802,7 +802,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
if (cancel)
return 0;
- vid_hdr = ubi_zalloc_vid_hdr(ubi);
+ vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
if (!vid_hdr)
return -ENOMEM;
@@ -1028,7 +1028,7 @@ static int ensure_wear_leveling(struct ubi_device *ubi)
ubi->wl_scheduled = 1;
spin_unlock(&ubi->wl_lock);
- wrk = kmalloc(sizeof(struct ubi_work), GFP_KERNEL);
+ wrk = kmalloc(sizeof(struct ubi_work), GFP_NOFS);
if (!wrk) {
err = -ENOMEM;
goto out_cancel;
@@ -1631,7 +1631,7 @@ static int paranoid_check_ec(const struct ubi_device *ubi, int pnum, int ec)
long long read_ec;
struct ubi_ec_hdr *ec_hdr;
- ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL);
+ ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
if (!ec_hdr)
return -ENOMEM;