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mmc: core: Remove unused buffer allocation in sd_enable_cache()

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sd_enable_cache() allocates a 512-byte buffer that is never used, hence
let's just drop it.

Signed-off-by: Chanwoo Lee <cw9316.lee@samsung.com>
Reviewed-by: Avri Altman <avri.altman@sandisk.com>
Reviewed-by: Shawn Lin <shawn.lin@linux.dev>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Chanwoo Lee 2026-06-02 18:40:55 +09:00 committed by Ulf Hansson
parent 89dfb7cc1a
commit 3f78a25623
1 changed files with 1 additions and 8 deletions
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9
drivers/mmc/core/sd.c
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@ -1379,15 +1379,10 @@ static int sd_flush_cache(struct mmc_host *host)
static int sd_enable_cache(struct mmc_card *card)
{
u8 *reg_buf;
int err;
card->ext_perf.feature_enabled &= ~SD_EXT_PERF_CACHE;
reg_buf = kzalloc(512, GFP_KERNEL);
if (!reg_buf)
return -ENOMEM;
/*
* Set Cache Enable at bit 0 in the performance enhancement register at
* 260 bytes offset.
@ -1397,7 +1392,7 @@ static int sd_enable_cache(struct mmc_card *card)
if (err) {
pr_warn("%s: error %d writing Cache Enable bit\n",
mmc_hostname(card->host), err);
goto out;
return err;
}
err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
@ -1405,8 +1400,6 @@ static int sd_enable_cache(struct mmc_card *card)
if (!err)
card->ext_perf.feature_enabled |= SD_EXT_PERF_CACHE;
out:
kfree(reg_buf);
return err;
}