From 822afeb7bf84ca1c9289a61ea99604b4deb8e091 Mon Sep 17 00:00:00 2001
From: Ronald Wahl <ronald.wahl@legrand.com>
Date: Wed, 11 Dec 2024 21:52:00 +0100
Subject: [PATCH] mmc: Fix potential timer value truncation
On 64bit systems the timer value might be truncated to a 32bit value
causing malfunctions. For example on ARM the timer might start from 0
again only after a cold reset. The 32bit overflow occurs after a bit
more than 49 days (1000 Hz counter) so booting after that time may lead
to a surprise because the board might become stuck requiring a cold
reset.
Signed-off-by: Ronald Wahl <ronald.wahl@legrand.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
---
drivers/mmc/mmc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index efe98354a0f..799586891af 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -750,7 +750,7 @@ static int mmc_send_op_cond(struct mmc *mmc)
{
int err, i;
int timeout = 1000;
- uint start;
+ ulong start;
/* Some cards seem to need this */
mmc_go_idle(mmc);
@@ -844,7 +844,8 @@ int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
static int __mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value,
bool send_status)
{
- unsigned int status, start;
+ ulong start;
+ unsigned int status;
struct mmc_cmd cmd;
int timeout_ms = DEFAULT_CMD6_TIMEOUT_MS;
bool is_part_switch = (set == EXT_CSD_CMD_SET_NORMAL) &&
--
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