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mmc: core: Limit retries when analyse of SDIO tuples fails

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commit f92e04f764b86e55e522988e6f4b6082d19a2721 upstream.

When analysing tuples fails we may loop indefinitely to retry. Let's avoid
this by using a 10s timeout and bail if not completed earlier.

Signed-off-by: Fengnan Chang <fengnanchang@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210123033230.36442-1-fengnanchang@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fengnan Chang 2021-01-23 11:32:31 +08:00 committed by Greg Kroah-Hartman
parent 57b452c5ab
commit a03a8693b1
1 changed files with 6 additions and 0 deletions
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6
drivers/mmc/core/sdio_cis.c
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@ -20,6 +20,8 @@
#include "sdio_cis.h"
#include "sdio_ops.h"
#define SDIO_READ_CIS_TIMEOUT_MS (10 * 1000) /* 10s */
static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
const unsigned char *buf, unsigned size)
{
@ -274,6 +276,8 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
do {
unsigned char tpl_code, tpl_link;
unsigned long timeout = jiffies +
msecs_to_jiffies(SDIO_READ_CIS_TIMEOUT_MS);
ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
if (ret)
@ -326,6 +330,8 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
prev = &this->next;
if (ret == -ENOENT) {
if (time_after(jiffies, timeout))
break;
/* warn about unknown tuples */
pr_warn_ratelimited("%s: queuing unknown"
" CIS tuple 0x%02x (%u bytes)\n",