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authorMax Gurtovoy <maxg@mellanox.com>2019-09-22 12:46:55 +0300
committerJens Axboe <axboe@kernel.dk>2019-09-23 08:05:19 -0600
commitbe21683e48f26032199504fb60b9a27eeff05fc3 (patch)
tree678d2c0db0f36f9314eddcbfe2ca7186b2876851 /block
parenteb09b3cc464d2c3bbde9a6648603c8d599ea8582 (diff)
block: t10-pi: fix -Wswitch warning
Changing the switch() statement to symbolic constants made the compiler (at least clang-9, did not check gcc) notice that there is one enum value that is not handled here: block/t10-pi.c:62:11: error: enumeration value 'T10_PI_TYPE0_PROTECTION' not handled in switch [-Werror,-Wswitch] Add a BUG_ON statement if we ever get to t10_pi_verify function with TYPE0 and replace the switch() statement with if/else clause for the valid types. Fixes: 9b2061b1a262 ("block: use symbolic constants for t10_pi type") Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/t10-pi.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/block/t10-pi.c b/block/t10-pi.c
index 0c0120a672f9..9803c7e0376e 100644
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -55,13 +55,14 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
{
unsigned int i;
+ BUG_ON(type == T10_PI_TYPE0_PROTECTION);
+
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
struct t10_pi_tuple *pi = iter->prot_buf;
__be16 csum;
- switch (type) {
- case T10_PI_TYPE1_PROTECTION:
- case T10_PI_TYPE2_PROTECTION:
+ if (type == T10_PI_TYPE1_PROTECTION ||
+ type == T10_PI_TYPE2_PROTECTION) {
if (pi->app_tag == T10_PI_APP_ESCAPE)
goto next;
@@ -73,12 +74,10 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
iter->seed, be32_to_cpu(pi->ref_tag));
return BLK_STS_PROTECTION;
}
- break;
- case T10_PI_TYPE3_PROTECTION:
+ } else if (type == T10_PI_TYPE3_PROTECTION) {
if (pi->app_tag == T10_PI_APP_ESCAPE &&
pi->ref_tag == T10_PI_REF_ESCAPE)
goto next;
- break;
}
csum = fn(iter->data_buf, iter->interval);

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