[MMC] extend data timeout for writes
The CSD contains a "read2write factor" which determines the multiplier to
be applied to the read timeout to obtain the write timeout. We were
ignoring this parameter, resulting in the possibility for writes being
timed out too early.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index 8eb2a2e..06bd1f4 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -187,6 +187,12 @@
brq.cmd.opcode = MMC_WRITE_BLOCK;
brq.data.flags |= MMC_DATA_WRITE;
brq.data.blocks = 1;
+
+ /*
+ * Scale up the timeout by the r2w factor
+ */
+ brq.data.timeout_ns <<= card->csd.r2w_factor;
+ brq.data.timeout_clks <<= card->csd.r2w_factor;
}
if (brq.data.blocks > 1) {