From: Russell King rmk+kernel@armlinux.org.uk
commit d1c536e3177390da43d99f20143b810c35433d1f upstream.
ADMA errors are potentially data corrupting events; although we print the register state, we do not usefully print the ADMA descriptors. Worse than that, we print them by referencing their virtual address which is meaningless when the register state gives us the DMA address of the failing descriptor.
Print the ADMA descriptors giving their DMA addresses rather than their virtual addresses, and print them using SDHCI_DUMP() rather than DBG().
We also do not show the correct value of the interrupt status register; the register dump shows the current value, after we have cleared the pending interrupts we are going to service. What is more useful is to print the interrupts that _were_ pending at the time the ADMA error was encountered. Fix that too.
Signed-off-by: Russell King rmk+kernel@armlinux.org.uk Acked-by: Adrian Hunter adrian.hunter@intel.com Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/sdhci.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)
--- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2638,6 +2638,7 @@ static void sdhci_cmd_irq(struct sdhci_h static void sdhci_adma_show_error(struct sdhci_host *host) { void *desc = host->adma_table; + dma_addr_t dma = host->adma_addr;
sdhci_dumpregs(host);
@@ -2645,18 +2646,21 @@ static void sdhci_adma_show_error(struct struct sdhci_adma2_64_desc *dma_desc = desc;
if (host->flags & SDHCI_USE_64_BIT_DMA) - DBG("%p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n", - desc, le32_to_cpu(dma_desc->addr_hi), + SDHCI_DUMP("%08llx: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n", + (unsigned long long)dma, + le32_to_cpu(dma_desc->addr_hi), le32_to_cpu(dma_desc->addr_lo), le16_to_cpu(dma_desc->len), le16_to_cpu(dma_desc->cmd)); else - DBG("%p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", - desc, le32_to_cpu(dma_desc->addr_lo), + SDHCI_DUMP("%08llx: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", + (unsigned long long)dma, + le32_to_cpu(dma_desc->addr_lo), le16_to_cpu(dma_desc->len), le16_to_cpu(dma_desc->cmd));
desc += host->desc_sz; + dma += host->desc_sz;
if (dma_desc->cmd & cpu_to_le16(ADMA2_END)) break; @@ -2732,7 +2736,8 @@ static void sdhci_data_irq(struct sdhci_ != MMC_BUS_TEST_R) host->data->error = -EILSEQ; else if (intmask & SDHCI_INT_ADMA_ERROR) { - pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); + pr_err("%s: ADMA error: 0x%08x\n", mmc_hostname(host->mmc), + intmask); sdhci_adma_show_error(host); host->data->error = -EIO; if (host->ops->adma_workaround)