Hi Jaehoon, On 2016/2/2 12:42, Jaehoon Chung wrote:
Hi, Shawn. On 01/22/2016 04:43 PM, Shawn Lin wrote:This patch make num_slots to 1 if pdata->num_slot is not defined. Meanwhile, we need to make sure num_slots should not larger that the supported slots Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> --- drivers/mmc/host/dw_mmc.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 7128351..065a8f5 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2949,12 +2949,6 @@ int dw_mci_probe(struct dw_mci *host) } } - if (host->pdata->num_slots < 1) { - dev_err(host->dev, - "Platform data must supply num_slots.\n"); - return -ENODEV; - } - host->biu_clk = devm_clk_get(host->dev, "biu"); if (IS_ERR(host->biu_clk)) { dev_dbg(host->dev, "biu clock not available\n"); @@ -3111,7 +3105,15 @@ int dw_mci_probe(struct dw_mci *host) if (host->pdata->num_slots) host->num_slots = host->pdata->num_slots; else - host->num_slots = SDMMC_GET_SLOT_NUM(mci_readl(host, HCON)); + host->num_slots = 1;If host->nums_slots is set to 1, it assumes that there is one slot. Then the code in dw_mci_parse_dt() can be removed dev_info(dev, "num-slots property not found, assuming 1 slot is available\n"); pdata->num_slots = 1;
Good catch. I will respin v2 to move it. Thanks.
Best Regards, Jaehoon Chung+ + if (host->num_slots < 1 || + host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) { + dev_err(host->dev, + "Platform data must supply correct num_slots.\n"); + ret = -ENODEV; + goto err_clk_ciu; + } /* * Enable interrupts for command done, data over, data empty,
-- Best Regards Shawn Lin -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
