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

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commit 011710e2ab upstream.

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 <sifan.naeem@imgtec.com>
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sifan Naeem
2015-07-27 13:11:15 +01:00
committed by Greg Kroah-Hartman
parent 49b85054a8
commit b82ed8c90e
1 changed files with 4 additions and 4 deletions
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8
drivers/spi/spi-img-spfi.c
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@@ -267,15 +267,15 @@ 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;
}