提交 3bca4cf7 编写于 作者: C Chris Ball 提交者: Linus Torvalds

sdio: don't use CMD[357] as part of a powered SDIO resume

Seen on a Marvell 8686 SDIO card and Via VX855 controller: we must avoid
sending CMD3/5/7 on a resume where power has been maintained, because the
8686 will refuse to respond to them and the MMC stack will give up on the
card.
Signed-off-by: NChris Ball <cjb@laptop.org>
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 2f4cbb3d
......@@ -224,7 +224,7 @@ static int sdio_enable_hs(struct mmc_card *card)
* we're trying to reinitialise.
*/
static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
struct mmc_card *oldcard)
struct mmc_card *oldcard, int powered_resume)
{
struct mmc_card *card;
int err;
......@@ -235,9 +235,11 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
/*
* Inform the card of the voltage
*/
err = mmc_send_io_op_cond(host, host->ocr, &ocr);
if (err)
goto err;
if (!powered_resume) {
err = mmc_send_io_op_cond(host, host->ocr, &ocr);
if (err)
goto err;
}
/*
* For SPI, enable CRC as appropriate.
......@@ -262,7 +264,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
/*
* For native busses: set card RCA and quit open drain mode.
*/
if (!mmc_host_is_spi(host)) {
if (!powered_resume && !mmc_host_is_spi(host)) {
err = mmc_send_relative_addr(host, &card->rca);
if (err)
goto remove;
......@@ -273,7 +275,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
/*
* Select card, as all following commands rely on that.
*/
if (!mmc_host_is_spi(host)) {
if (!powered_resume && !mmc_host_is_spi(host)) {
err = mmc_select_card(card);
if (err)
goto remove;
......@@ -437,7 +439,8 @@ static int mmc_sdio_resume(struct mmc_host *host)
/* Basic card reinitialization. */
mmc_claim_host(host);
err = mmc_sdio_init_card(host, host->ocr, host->card);
err = mmc_sdio_init_card(host, host->ocr, host->card,
(host->pm_flags & MMC_PM_KEEP_POWER));
mmc_release_host(host);
/*
......@@ -507,7 +510,7 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
/*
* Detect and init the card.
*/
err = mmc_sdio_init_card(host, host->ocr, NULL);
err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
if (err)
goto err;
card = host->card;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册