diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2017-01-25 02:17:56 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-25 03:26:14 +0300 |
| commit | de182cc8e882f74af2a112e09f148ce646937232 (patch) | |
| tree | 08d50362a81f1a786d94bec135ea3457ed57965d | |
| parent | b94f51183b0617e7b9b4fb4137d4cf1cab7547c2 (diff) | |
| download | linux-de182cc8e882f74af2a112e09f148ce646937232.tar.xz | |
drivers/memstick/core/memstick.c: avoid -Wnonnull warning
gcc-7 produces a harmless false-postive warning about a possible NULL
pointer access:
drivers/memstick/core/memstick.c: In function 'h_memstick_read_dev_id':
drivers/memstick/core/memstick.c:309:3: error: argument 2 null where non-null expected [-Werror=nonnull]
memcpy(mrq->data, buf, mrq->data_len);
This can't happen because the caller sets the command to 'MS_TPC_READ_REG',
which causes the data direction to be 'READ' and the NULL pointer not
accessed.
As a simple workaround for the warning, we can pass a pointer to the
data that we actually want to read into. This is not needed here, but
also harmless, and lets the compiler know that the access is ok.
Link: http://lkml.kernel.org/r/20170111144143.548867-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/memstick/core/memstick.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c index a0547dbf9806..76382c858c35 100644 --- a/drivers/memstick/core/memstick.c +++ b/drivers/memstick/core/memstick.c @@ -330,7 +330,7 @@ static int h_memstick_read_dev_id(struct memstick_dev *card, struct ms_id_register id_reg; if (!(*mrq)) { - memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL, + memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, &id_reg, sizeof(struct ms_id_register)); *mrq = &card->current_mrq; return 0; |