ssb: sdio: Don't overwrite const buffer if block_write fails

commit 47ec636f7a25aa2549e198c48ecb6b1c25d05456 upstream.

It doesn't make sense to clobber the const driver-side buffer, if a
write-to-device attempt failed. All other SSB variants (PCI, PCMCIA and SoC)
also don't corrupt the buffer on any failure in block_write.
Therefore, remove this memset from the SDIO variant.

Signed-off-by: Michael Büsch <[email protected]>
Cc: [email protected]
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/20210515210252.318be2ba@wiggum
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/ssb/sdio.c

@@ -411,7 +411,6 @@ static void ssb_sdio_block_write(struct ssb_device *dev, const void *buffer,
 	sdio_claim_host(bus->host_sdio);
 	if (unlikely(ssb_sdio_switch_core(bus, dev))) {
 		error = -EIO;
-		memset((void *)buffer, 0xff, count);
 		goto err_out;
 	}
 	offset |= bus->sdio_sbaddr & 0xffff;