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[ARM] Fix potential MMCI bug

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The MMCI driver might end up aborting the initial command and leaving
the data part of the command sequence still in place.  Avoid this
problem by ensuring that any data sequence is properly cleared out
when a command completes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-01-08 16:42:51 +00:00 committed by Russell King
parent db6ccbb61c
commit e47c222b22
1 changed files with 4 additions and 0 deletions
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4
drivers/mmc/mmci.c
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@ -42,6 +42,8 @@ mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
{ {
writel(0, host->base + MMCICOMMAND); writel(0, host->base + MMCICOMMAND);
BUG_ON(host->data);
host->mrq = NULL; host->mrq = NULL;
host->cmd = NULL; host->cmd = NULL;
@ -198,6 +200,8 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
} }
if (!cmd->data || cmd->error != MMC_ERR_NONE) { if (!cmd->data || cmd->error != MMC_ERR_NONE) {
if (host->data)
mmci_stop_data(host);
mmci_request_end(host, cmd->mrq); mmci_request_end(host, cmd->mrq);
} else if (!(cmd->data->flags & MMC_DATA_READ)) { } else if (!(cmd->data->flags & MMC_DATA_READ)) {
mmci_start_data(host, cmd->data); mmci_start_data(host, cmd->data);