target/linux/brcm2708/patches-4.19/950-0534-mmc-sdhci-Mask-spurious-interrupts.patch

   1 From be309b7db77215610d5ac15bf0aacd47ea5b3433 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Fri, 28 Sep 2018 16:24:05 +0100
   4 Subject: [PATCH 534/806] mmc: sdhci: Mask "spurious" interrupts
   5
   6 Add a filter for "spurious" Transfer Complete interrupts, attempting
   7 to make it as specific as possible:
   8 * INT_DATA_END (transfer complete) is set
   9 * There is a stop command in progress
  10 * There is no data transfer in progress
  11
  12 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  13 ---
  14  drivers/mmc/host/sdhci.c | 4 ++++
  15  1 file changed, 4 insertions(+)
  16
  17 --- a/drivers/mmc/host/sdhci.c
  18 +++ b/drivers/mmc/host/sdhci.c
  19 @@ -2932,6 +2932,10 @@ static irqreturn_t sdhci_irq(int irq, vo
  20                         result = IRQ_WAKE_THREAD;
  21                 }
  22
  23 +               if ((intmask & SDHCI_INT_DATA_END) && !host->data &&
  24 +                   host->cmd && (host->cmd == host->cmd->mrq->stop))
  25 +                       intmask &= ~SDHCI_INT_DATA_END;
  26 +
  27                 if (intmask & SDHCI_INT_CMD_MASK)
  28                         sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK, &intmask);
  29