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mmc: Graceful fallback for fancy features 

MMC high-speed, wide bus support and SD high-speed
are functions that aren't critical for correct
operation of the card. As such, they shouldn't mark
the card as bad or dead when there is a failure
activating these features.

This is needed in particular on some really stupid
hardware (e.g. Winbond's) where not all data transfer
commands are supported.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2007-01-07 16:59:06 +01:00
parent 5ba593a972
commit ae06eaf9ab
1 changed files with 7 additions and 9 deletions
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16
drivers/mmc/mmc.c
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@ -1092,7 +1092,8 @@ static void mmc_process_ext_csds(struct mmc_host *host)
mmc_wait_for_req(host, &mrq);
if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
mmc_card_set_dead(card);
printk("%s: unable to read EXT_CSD, performance "
"might suffer.\n", mmc_hostname(card->host));
continue;
}
@ -1108,7 +1109,6 @@ static void mmc_process_ext_csds(struct mmc_host *host)
printk("%s: card is mmc v4 but doesn't support "
"any high-speed modes.\n",
mmc_hostname(card->host));
mmc_card_set_bad(card);
continue;
}
@ -1289,7 +1289,9 @@ static void mmc_read_switch_caps(struct mmc_host *host)
mmc_wait_for_req(host, &mrq);
if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
mmc_card_set_dead(card);
printk("%s: unable to read switch capabilities, "
"performance might suffer.\n",
mmc_hostname(card->host));
continue;
}
@ -1321,12 +1323,8 @@ static void mmc_read_switch_caps(struct mmc_host *host)
mmc_wait_for_req(host, &mrq);
if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
mmc_card_set_dead(card);
continue;
}
if ((status[16] & 0xF) != 1) {
if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE ||
(status[16] & 0xF) != 1) {
printk(KERN_WARNING "%s: Problem switching card "
"into high-speed mode!\n",
mmc_hostname(host));