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mmc: mmci: don't read command response when invalid

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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>
This commit is contained in:
Russell King - ARM Linux 2011-01-11 16:35:56 +00:00 committed by Chris Ball
parent 021cb59ae3
commit 9047b435a0
1 changed files with 5 additions and 5 deletions
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10
drivers/mmc/host/mmci.c
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@ -342,15 +342,15 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
host->cmd = NULL; 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) { if (status & MCI_CMDTIMEOUT) {
cmd->error = -ETIMEDOUT; cmd->error = -ETIMEDOUT;
} else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) { } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
cmd->error = -EILSEQ; 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) { if (!cmd->data || cmd->error) {