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mmc: dw_mmc: fix the spamming log message

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When there is no Card which is set to "broken-cd", it's displayed a clock
information continuously. Because it's polling for detecting card.
This patch is fixed this problem.

Fixes: 65257a0dee ("mmc: dw_mmc: remove UBSAN warning in dw_mci_setup_bus()")
Reported-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jaehoon Chung 2016-09-22 14:12:00 +09:00 • committed by Ulf Hansson
parent 3be7988674
commit 005d675aa1
2 changed files with 12 additions and 5 deletions
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4
drivers/mmc/host/dw_mmc.c
View file

@ -1112,6 +1112,7 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0;
if (clock != slot->__clk_old || force_clkinit)
dev_info(&slot->mmc->class_dev, dev_info(&slot->mmc->class_dev,
"Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n",
slot->id, host->bus_hz, clock, slot->id, host->bus_hz, clock,
@ -1139,6 +1140,9 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
/* inform CIU */ /* inform CIU */
mci_send_cmd(slot, sdmmc_cmd_bits, 0); mci_send_cmd(slot, sdmmc_cmd_bits, 0);
/* keep the last clock value that was requested from core */
slot->__clk_old = clock;
} }
host->current_speed = clock; host->current_speed = clock;

3
drivers/mmc/host/dw_mmc.h
View file

@ -249,6 +249,8 @@ extern int dw_mci_resume(struct dw_mci *host);
* @queue_node: List node for placing this node in the @queue list of * @queue_node: List node for placing this node in the @queue list of
* &struct dw_mci. * &struct dw_mci.
* @clock: Clock rate configured by set_ios(). Protected by host->lock. * @clock: Clock rate configured by set_ios(). Protected by host->lock.
* @__clk_old: The last clock value that was requested from core.
* Keeping track of this helps us to avoid spamming the console.
* @flags: Random state bits associated with the slot. * @flags: Random state bits associated with the slot.
* @id: Number of this slot. * @id: Number of this slot.
* @sdio_id: Number of this slot in the SDIO interrupt registers. * @sdio_id: Number of this slot in the SDIO interrupt registers.
@ -263,6 +265,7 @@ struct dw_mci_slot {
struct list_head queue_node; struct list_head queue_node;
unsigned int clock; unsigned int clock;
unsigned int __clk_old;
unsigned long flags; unsigned long flags;
#define DW_MMC_CARD_PRESENT 0 #define DW_MMC_CARD_PRESENT 0