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spi: img-spfi: check for timeout error before proceeding

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Calling spfi_wait_all_done is not required if the transfer has timed
out before all data is transferred.

spfi_wait_all_done polls for Alldone interrupt which is triggered to
mark the transfer as complete and to indicate it is now safe to issue
a new transfer.

Fixes: 8c2c8c0 ("spi: img-spfi: Control CS lines with GPIO")
Signed-off-by: Sifan Naeem <[email protected]>
Reviewed-by: Andrew Bresticker <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]
This commit is contained in:
Sifan Naeem 2015-07-27 13:11:15 +01:00 • committed by Mark Brown
commit 011710e2ab
1 changed files with 4 additions and 4 deletions
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8
drivers/spi/spi-img-spfi.c
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@ -266,15 +266,15 @@ static int img_spfi_start_pio(struct spi_master *master,
cpu_relax();
}
ret = spfi_wait_all_done(spfi);
if (ret < 0)
return ret;
if (rx_bytes > 0 || tx_bytes > 0) {
dev_err(spfi->dev, "PIO transfer timed out\n");
return -ETIMEDOUT;
}
ret = spfi_wait_all_done(spfi);
if (ret < 0)
return ret;
return 0;
}