diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 447eef8217c7..47055f3f01b8 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1823,7 +1823,6 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) struct sdhci_host *host = mmc_priv(mmc); u16 ctrl; int tuning_loop_counter = MAX_TUNING_LOOP; - unsigned long timeout; int err = 0; unsigned long flags; @@ -1882,14 +1881,10 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number * of loops reaches 40 times or a timeout of 150ms occurs. */ - timeout = 150; do { struct mmc_command cmd = {0}; struct mmc_request mrq = {NULL}; - if (!tuning_loop_counter && !timeout) - break; - cmd.opcode = opcode; cmd.arg = 0; cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; @@ -1897,6 +1892,9 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) cmd.data = NULL; cmd.error = 0; + if (tuning_loop_counter-- == 0) + break; + mrq.cmd = &cmd; host->mrq = &mrq; @@ -1954,8 +1952,6 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) host->tuning_done = 0; ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); - tuning_loop_counter--; - timeout--; /* eMMC spec does not require a delay between tuning cycles */ if (opcode == MMC_SEND_TUNING_BLOCK) @@ -1966,17 +1962,15 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) * The Host Driver has exhausted the maximum number of loops allowed, * so use fixed sampling frequency. */ - if (!tuning_loop_counter || !timeout) { + if (tuning_loop_counter < 0) { ctrl &= ~SDHCI_CTRL_TUNED_CLK; sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); + } + if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { + pr_info(DRIVER_NAME ": Tuning procedure" + " failed, falling back to fixed sampling" + " clock\n"); err = -EIO; - } else { - if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { - pr_info(DRIVER_NAME ": Tuning procedure" - " failed, falling back to fixed sampling" - " clock\n"); - err = -EIO; - } } out: |