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authorRussell King - ARM Linux <linux@arm.linux.org.uk>2011-01-11 16:35:56 +0000
committerChris Ball <cjb@laptop.org>2011-01-25 21:53:46 -0500
commit9047b435a0b43952f5d1f7eb15a9b63a36efc7f2 (patch)
tree065f85eb0a24659a3b79059c20e092afaaa3be08 /drivers/mmc
parent021cb59ae3869fb18ebc9fceb959f379c5ca835c (diff)
downloadop-kernel-dev-9047b435a0b43952f5d1f7eb15a9b63a36efc7f2.zip
op-kernel-dev-9047b435a0b43952f5d1f7eb15a9b63a36efc7f2.tar.gz
mmc: mmci: don't read command response when invalid
Don't read the command response from the registers when either the command timed out (because there was no response from the card) or the checksum on the response was invalid. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mmci.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 2de12fe..4b8dcd5 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -342,15 +342,15 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
host->cmd = NULL;
- cmd->resp[0] = readl(base + MMCIRESPONSE0);
- cmd->resp[1] = readl(base + MMCIRESPONSE1);
- cmd->resp[2] = readl(base + MMCIRESPONSE2);
- cmd->resp[3] = readl(base + MMCIRESPONSE3);
-
if (status & MCI_CMDTIMEOUT) {
cmd->error = -ETIMEDOUT;
} else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
cmd->error = -EILSEQ;
+ } else {
+ cmd->resp[0] = readl(base + MMCIRESPONSE0);
+ cmd->resp[1] = readl(base + MMCIRESPONSE1);
+ cmd->resp[2] = readl(base + MMCIRESPONSE2);
+ cmd->resp[3] = readl(base + MMCIRESPONSE3);
}
if (!cmd->data || cmd->error) {
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