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771a3dc225
sdhci_post_req() exists to unmap a previously mapped but already finished request, while the next request is in progress. However, the state of the SDHCI_REQ_USE_DMA flag depends on the last submitted request. This means we can end up clearing the flag due to a quirk, which then means that sdhci_post_req() fails to unmap the DMA buffer, potentially leading to data corruption. We can safely ignore the SDHCI_REQ_USE_DMA here, as testing data->host_cookie is entirely sufficient. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> [ Re-based to apply as a separate fix ] Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: stable@vger.kernel.org # v4.5+ Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
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