This is a note to let you know that I've just added the patch titled
mmc: core: Normalize the error handling branch in sd_read_ext_regs()
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-core-normalize-the-error-handling-branch-in-sd_r.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6e45dab975608898eeecfc564188687301e8cc30
Author: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
Date: Wed Nov 30 21:49:20 2022 +0800
mmc: core: Normalize the error handling branch in sd_read_ext_regs()
[ Upstream commit fc02e2b52389c8fde02852b2f959c0b45f042bbd ]
Let's use pr_err() to output the error messages and let's extend a comment
to clarify why returning 0 (success) in one case make sense.
Fixes: c784f92769ae ("mmc: core: Read the SD function extension registers for power management")
Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
[Ulf: Clarified the comment and the commit-msg]
Link: https://lore.kernel.org/r/20221130134920.2109-1-thunder.leizhen@xxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 3662bf5320ce..72b664ed90cf 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -1259,7 +1259,7 @@ static int sd_read_ext_regs(struct mmc_card *card)
*/
err = sd_read_ext_reg(card, 0, 0, 0, 512, gen_info_buf);
if (err) {
- pr_warn("%s: error %d reading general info of SD ext reg\n",
+ pr_err("%s: error %d reading general info of SD ext reg\n",
mmc_hostname(card->host), err);
goto out;
}
@@ -1273,7 +1273,12 @@ static int sd_read_ext_regs(struct mmc_card *card)
/* Number of extensions to be find. */
num_ext = gen_info_buf[4];
- /* We support revision 0, but limit it to 512 bytes for simplicity. */
+ /*
+ * We only support revision 0 and limit it to 512 bytes for simplicity.
+ * No matter what, let's return zero to allow us to continue using the
+ * card, even if we can't support the features from the SD function
+ * extensions registers.
+ */
if (rev != 0 || len > 512) {
pr_warn("%s: non-supported SD ext reg layout\n",
mmc_hostname(card->host));
@@ -1288,7 +1293,7 @@ static int sd_read_ext_regs(struct mmc_card *card)
for (i = 0; i < num_ext; i++) {
err = sd_parse_ext_reg(card, gen_info_buf, &next_ext_addr);
if (err) {
- pr_warn("%s: error %d parsing SD ext reg\n",
+ pr_err("%s: error %d parsing SD ext reg\n",
mmc_hostname(card->host), err);
goto out;
}
