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spi: spi-msm-geni: Propagate missing change from 4.19 to 5.4

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Propagate following change from 4.19 to 5.4 for SPI driver.
'commit 67192635d468 ("spi: spi-geni-qcom: Check for zero length
transfer")'.

Change-Id: I27bdd8b544ba1bdaa0a868d2260c4f76c156c215
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>
This commit is contained in:
Vipin Deep Kaur 2020-06-30 14:46:44 +05:30
commit c5d86f08db
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-msm-geni.c
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@ -1213,6 +1213,12 @@ static int spi_geni_transfer_one(struct spi_master *spi,
return -EINVAL;
}
/* Check for zero length transfer */
if (xfer->len < 1) {
dev_err(mas->dev, "Zero length transfer\n");
return -EINVAL;
}
if (mas->cur_xfer_mode != GSI_DMA) {
reinit_completion(&mas->xfer_done);
setup_fifo_xfer(xfer, mas, slv->mode, spi);