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authorWolfram Sang <wsa+renesas@sang-engineering.com>2016-05-09 09:59:59 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2016-05-16 11:31:27 +0200
commit88ea46bcbfd677b779897bbada32ec0709a6c92f (patch)
tree49d5cb6ee7697dbe63788d43221dbfa60f880b6b /drivers/mmc
parent5b5fe95a6977b9cdd30749cb1576df2329d70da9 (diff)
downloadblackbird-op-linux-88ea46bcbfd677b779897bbada32ec0709a6c92f.tar.gz
blackbird-op-linux-88ea46bcbfd677b779897bbada32ec0709a6c92f.zip
mmc: sdio: fall back to SDIO 1.0 for broken 1.1 cards
I have two SDIO WLAN cards which specify being SDIO Rev. 1.1 cards but their FUNCE tuple reports the smaller size of a Rev 1.0 card. So, enforce 1.0 on these cards to avoid reading the not present registers. They are not really used anyhow. My cards initialize properly after this patch. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/sdio_cis.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
index 6f6fc527a263..dcb3dee59fa5 100644
--- a/drivers/mmc/core/sdio_cis.c
+++ b/drivers/mmc/core/sdio_cis.c
@@ -177,8 +177,13 @@ static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
vsn = func->card->cccr.sdio_vsn;
min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
- if (size < min_size)
+ if (size == 28 && vsn == SDIO_SDIO_REV_1_10) {
+ pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
+ mmc_hostname(card->host));
+ vsn = SDIO_SDIO_REV_1_00;
+ } else if (size < min_size) {
return -EINVAL;
+ }
/* TPLFE_MAX_BLK_SIZE */
func->max_blksize = buf[12] | (buf[13] << 8);
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