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authorNicolas Ferre <nicolas.ferre@atmel.com>2008-05-30 14:28:45 +0200
committerPierre Ossman <drzeus@drzeus.cx>2008-07-15 14:14:42 +0200
commitba7deeed96ca1855c153ad81c45baf6efe1a3362 (patch)
tree9abf223b5dff465f9dd1f0aa5e30d17f44afc685
parent7a6588ba20aed4505da912f9dd73616e9bd9ba67 (diff)
mmc: at91_mci: do not read irq status twice as it will forget some errors
Reading AT91_MCI_SR again at the end of transfer can corrupt the error reporting. Some fields in the SR register are read-and-clear. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
-rw-r--r--drivers/mmc/host/at91_mci.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 9b546a97aa4..e1f91a42d52 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -660,10 +660,9 @@ static void at91_mci_process_next(struct at91mci_host *host)
/*
* Handle a command that has been completed
*/
-static void at91_mci_completed_command(struct at91mci_host *host)
+static void at91_mci_completed_command(struct at91mci_host *host, unsigned int status)
{
struct mmc_command *cmd = host->cmd;
- unsigned int status;
at91_mci_write(host, AT91_MCI_IDR, 0xffffffff & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));
@@ -677,10 +676,9 @@ static void at91_mci_completed_command(struct at91mci_host *host)
host->buffer = NULL;
}
- status = at91_mci_read(host, AT91_MCI_SR);
-
- pr_debug("Status = %08X [%08X %08X %08X %08X]\n",
- status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+ pr_debug("Status = %08X/%08x [%08X %08X %08X %08X]\n",
+ status, at91_mci_read(host, AT91_MCI_SR),
+ cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
if (status & AT91_MCI_ERRORS) {
if ((status & AT91_MCI_RCRCE) && !(mmc_resp_type(cmd) & MMC_RSP_CRC)) {
@@ -877,7 +875,7 @@ static irqreturn_t at91_mci_irq(int irq, void *devid)
if (completed) {
pr_debug("Completed command\n");
at91_mci_write(host, AT91_MCI_IDR, 0xffffffff & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));
- at91_mci_completed_command(host);
+ at91_mci_completed_command(host, int_status);
} else
at91_mci_write(host, AT91_MCI_IDR, int_status & ~(AT91_MCI_SDIOIRQA | AT91_MCI_SDIOIRQB));