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authorLiu Jian <liujian56@huawei.com>2019-03-03 10:04:18 +0300
committerRichard Weinberger <richard@nod.at>2019-04-05 01:39:19 +0300
commitd9b8a67b3b95a5c5aae6422b8113adc1c2485f2b (patch)
treeb22c2616614de4c88a566f97c934ac331717e7a7 /drivers/mtd/chips
parent8c2ffd9174779014c3fe1f96d9dc3641d9175f00 (diff)
downloadlinux-d9b8a67b3b95a5c5aae6422b8113adc1c2485f2b.tar.xz
mtd: cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer
In function do_write_buffer(), in the for loop, there is a case chip_ready() returns 1 while chip_good() returns 0, so it never break the loop. To fix this, chip_good() is enough and it should timeout if it stay bad for a while. Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check correct value") Signed-off-by: Yi Huaijie <yihuaijie@huawei.com> Signed-off-by: Liu Jian <liujian56@huawei.com> Reviewed-by: Tokunori Ikegami <ikegami_to@yahoo.co.jp> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/chips')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 72428b6bfc47..7b7286b4d81e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1876,7 +1876,11 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
continue;
}
- if (time_after(jiffies, timeo) && !chip_ready(map, adr))
+ /*
+ * We check "time_after" and "!chip_good" before checking "chip_good" to avoid
+ * the failure due to scheduling.
+ */
+ if (time_after(jiffies, timeo) && !chip_good(map, adr, datum))
break;
if (chip_good(map, adr, datum)) {