The patch titled
sdio: initialise SDIO functions and update card->sdio_funcs in lockstep
has been added to the -mm tree. Its filename is
sdio-initialise-sdio-functions-and-update-card-sdio_funcs-in-lockstep.patch
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------------------------------------------------------
Subject: sdio: initialise SDIO functions and update card->sdio_funcs in lockstep
From: Matt Fleming <[email protected]>
We need to accurately track how many SDIO functions have been initialised
(and keep card->sdio_funcs in sync) so that we don't try to remove more
functions than we initialised if we hit the error path in
mmc_attach_sdio().
Without this patch if we hit the error path in mmc_attach_sdio() we run
the risk of deferencing invalid memory in sdio_remove_func(), leading to a
crash.
Signed-off-by: Matt Fleming <[email protected]>
Cc: Daniel Drake <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/mmc/core/sdio.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN
drivers/mmc/core/sdio.c~sdio-initialise-sdio-functions-and-update-card-sdio_funcs-in-lockstep
drivers/mmc/core/sdio.c
---
a/drivers/mmc/core/sdio.c~sdio-initialise-sdio-functions-and-update-card-sdio_funcs-in-lockstep
+++ a/drivers/mmc/core/sdio.c
@@ -516,7 +516,8 @@ int mmc_attach_sdio(struct mmc_host *hos
* The number of functions on the card is encoded inside
* the ocr.
*/
- card->sdio_funcs = funcs = (ocr & 0x70000000) >> 28;
+ funcs = (ocr & 0x70000000) >> 28;
+ card->sdio_funcs = 0;
/*
* If needed, disconnect card detection pull-up resistor.
@@ -528,7 +529,7 @@ int mmc_attach_sdio(struct mmc_host *hos
/*
* Initialize (but don't add) all present functions.
*/
- for (i = 0;i < funcs;i++) {
+ for (i = 0;i < funcs;i++, card->sdio_funcs++) {
err = sdio_init_func(host->card, i + 1);
if (err)
goto remove;
_
Patches currently in -mm which might be from [email protected] are
linux-next.patch
sdio-initialise-sdio-functions-and-update-card-sdio_funcs-in-lockstep.patch
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