Merge tag 'mmc-v6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Fix pwrseq for WILC1000/WILC3000 SDIO card

  MMC host:
   - vub300: Fix invalid response handling"

* tag 'mmc-v6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: pwrseq: sd8787: Fix WILC CHIP_EN and RESETN toggling order
  mmc: vub300: fix invalid response handling

Author: torvalds

drivers/mmc/core/pwrseq_sd8787.c

@@ -28,7 +28,6 @@ struct mmc_pwrseq_sd8787 {
 	struct mmc_pwrseq pwrseq;
 	struct gpio_desc *reset_gpio;
 	struct gpio_desc *pwrdn_gpio;
-	u32 reset_pwrdwn_delay_ms;
 };
 
 #define to_pwrseq_sd8787(p) container_of(p, struct mmc_pwrseq_sd8787, pwrseq)
@@ -39,7 +38,7 @@ static void mmc_pwrseq_sd8787_pre_power_on(struct mmc_host *host)
 
 	gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
 
-	msleep(pwrseq->reset_pwrdwn_delay_ms);
+	msleep(300);
 	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1);
 }
 
@@ -51,17 +50,37 @@ static void mmc_pwrseq_sd8787_power_off(struct mmc_host *host)
 	gpiod_set_value_cansleep(pwrseq->reset_gpio, 0);
 }
 
+static void mmc_pwrseq_wilc1000_pre_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq);
+
+	/* The pwrdn_gpio is really CHIP_EN, reset_gpio is RESETN */
+	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1);
+	msleep(5);
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
+}
+
+static void mmc_pwrseq_wilc1000_power_off(struct mmc_host *host)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq);
+
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 0);
+	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 0);
+}
+
 static const struct mmc_pwrseq_ops mmc_pwrseq_sd8787_ops = {
 	.pre_power_on = mmc_pwrseq_sd8787_pre_power_on,
 	.power_off = mmc_pwrseq_sd8787_power_off,
 };
 
-static const u32 sd8787_delay_ms = 300;
-static const u32 wilc1000_delay_ms = 5;
+static const struct mmc_pwrseq_ops mmc_pwrseq_wilc1000_ops = {
+	.pre_power_on = mmc_pwrseq_wilc1000_pre_power_on,
+	.power_off = mmc_pwrseq_wilc1000_power_off,
+};
 
 static const struct of_device_id mmc_pwrseq_sd8787_of_match[] = {
-	{ .compatible = "mmc-pwrseq-sd8787", .data = &sd8787_delay_ms },
-	{ .compatible = "mmc-pwrseq-wilc1000", .data = &wilc1000_delay_ms },
+	{ .compatible = "mmc-pwrseq-sd8787", .data = &mmc_pwrseq_sd8787_ops },
+	{ .compatible = "mmc-pwrseq-wilc1000", .data = &mmc_pwrseq_wilc1000_ops },
 	{/* sentinel */},
 };
 MODULE_DEVICE_TABLE(of, mmc_pwrseq_sd8787_of_match);
@@ -77,7 +96,6 @@ static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	match = of_match_node(mmc_pwrseq_sd8787_of_match, pdev->dev.of_node);
-	pwrseq->reset_pwrdwn_delay_ms = *(u32 *)match->data;
 
 	pwrseq->pwrdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
 	if (IS_ERR(pwrseq->pwrdn_gpio))
@@ -88,7 +106,7 @@ static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev)
 		return PTR_ERR(pwrseq->reset_gpio);
 
 	pwrseq->pwrseq.dev = dev;
-	pwrseq->pwrseq.ops = &mmc_pwrseq_sd8787_ops;
+	pwrseq->pwrseq.ops = match->data;
 	pwrseq->pwrseq.owner = THIS_MODULE;
 	platform_set_drvdata(pdev, pwrseq);
 

drivers/mmc/host/vub300.c

@@ -1713,6 +1713,9 @@ static void construct_request_response(struct vub300_mmc_host *vub300,
 	int bytes = 3 & less_cmd;
 	int words = less_cmd >> 2;
 	u8 *r = vub300->resp.response.command_response;
+
+	if (!resp_len)
+		return;
 	if (bytes == 3) {
 		cmd->resp[words] = (r[1 + (words << 2)] << 24)
 			| (r[2 + (words << 2)] << 16)