diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0433-mmc-bcm2835-sdhost-Recover-from-MMC_SEND_EXT_CSD.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0433-mmc-bcm2835-sdhost-Recover-from-MMC_SEND_EXT_CSD.patch | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0433-mmc-bcm2835-sdhost-Recover-from-MMC_SEND_EXT_CSD.patch b/target/linux/brcm2708/patches-4.14/950-0433-mmc-bcm2835-sdhost-Recover-from-MMC_SEND_EXT_CSD.patch deleted file mode 100644 index 8e9d036faf..0000000000 --- a/target/linux/brcm2708/patches-4.14/950-0433-mmc-bcm2835-sdhost-Recover-from-MMC_SEND_EXT_CSD.patch +++ /dev/null @@ -1,50 +0,0 @@ -From 6191e47f23fe4fa13dfbb38dfdda12e567028963 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Fri, 26 Oct 2018 17:29:51 +0100 -Subject: [PATCH 433/454] mmc/bcm2835-sdhost: Recover from MMC_SEND_EXT_CSD - -If the user issues an "mmc extcsd read", the SD controller receives -what it thinks is a SEND_IF_COND command with an unexpected data block. -The resulting operations leave the FSM stuck in READWAIT, a state which -persists until the MMC framework resets the controller, by which point -the root filesystem is likely to have been unmounted. - -A less heavyweight solution is to detect the condition and nudge the -FSM by asserting the (self-clearing) FORCE_DATA_MODE bit. - -N.B. This workaround was essentially discovered by accident and without -a full understanding the inner workings of the controller, so it is -fortunate that the "fix" only modifies error paths. - -See: https://github.com/raspberrypi/linux/issues/2728 - -Signed-off-by: Phil Elwell <phil@raspberrypi.org> ---- - drivers/mmc/host/bcm2835-sdhost.c | 9 +++++++++ - 1 file changed, 9 insertions(+) - ---- a/drivers/mmc/host/bcm2835-sdhost.c -+++ b/drivers/mmc/host/bcm2835-sdhost.c -@@ -1244,6 +1244,8 @@ static void bcm2835_sdhost_finish_comman - pr_info("%s: ignoring CRC7 error for CMD1\n", - mmc_hostname(host->mmc)); - } else { -+ u32 edm, fsm; -+ - if (sdhsts & SDHSTS_CMD_TIME_OUT) { - if (host->debug) - pr_warn("%s: command %d timeout\n", -@@ -1256,6 +1258,13 @@ static void bcm2835_sdhost_finish_comman - host->cmd->opcode); - host->cmd->error = -EILSEQ; - } -+ -+ edm = readl(host->ioaddr + SDEDM); -+ fsm = edm & SDEDM_FSM_MASK; -+ if (fsm == SDEDM_FSM_READWAIT || -+ fsm == SDEDM_FSM_WRITESTART1) -+ writel(edm | SDEDM_FORCE_DATA_MODE, -+ host->ioaddr + SDEDM); - tasklet_schedule(&host->finish_tasklet); - return; - } |