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| author | Liu Jian <liujian56@huawei.com> | 2019-03-03 15:04:18 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 17:20:52 +0200 |
| commit | 8660cae0b950dc4d9ab4834d67064d7754677403 (patch) | |
| tree | d383886f2d04ed6adb24b604d92d411aa6cc5c5b | |
| parent | d2a2ac28ef55f2cc88e9ff541e37d3f67446397a (diff) | |
| download | linux-stable-8660cae0b950dc4d9ab4834d67064d7754677403.tar.gz linux-stable-8660cae0b950dc4d9ab4834d67064d7754677403.tar.bz2 linux-stable-8660cae0b950dc4d9ab4834d67064d7754677403.zip | |
mtd: cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer
commit d9b8a67b3b95a5c5aae6422b8113adc1c2485f2b upstream.
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>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 6 |
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 7589d891b311..972935f1b2f7 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1881,7 +1881,11 @@ 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)) { |