evie/android_kernel_oneplus_msm8998
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Merge "spi: spi_qsd: serve set_cs call only for valid device status"

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Linux Build Service Account 2017-07-03 07:57:49 -07:00 • committed by Gerrit - the friendly Code Review server
commit 37541eb4b8
1 changed files with 15 additions and 2 deletions
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17
drivers/spi/spi_qsd.c
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@ -1494,11 +1494,11 @@ static inline void msm_spi_set_cs(struct spi_device *spi, bool set_flag)
struct msm_spi *dd = spi_master_get_devdata(spi->master);
u32 spi_ioc;
u32 spi_ioc_orig;
int rc;
int rc = 0;
rc = pm_runtime_get_sync(dd->dev);
if (rc < 0) {
dev_err(dd->dev, "Failure during runtime get");
dev_err(dd->dev, "Failure during runtime get,rc=%d", rc);
return;
}
@ -1513,6 +1513,15 @@ static inline void msm_spi_set_cs(struct spi_device *spi, bool set_flag)
if (!(spi->mode & SPI_CS_HIGH))
set_flag = !set_flag;
/* Serve only under mutex lock as RT suspend may cause a race */
mutex_lock(&dd->core_lock);
if (dd->suspended) {
dev_err(dd->dev, "%s: SPI operational state=%d Invalid\n",
__func__, dd->suspended);
mutex_unlock(&dd->core_lock);
return;
}
spi_ioc = readl_relaxed(dd->base + SPI_IO_CONTROL);
spi_ioc_orig = spi_ioc;
if (set_flag)
@ -1524,6 +1533,8 @@ static inline void msm_spi_set_cs(struct spi_device *spi, bool set_flag)
writel_relaxed(spi_ioc, dd->base + SPI_IO_CONTROL);
if (dd->pdata->is_shared)
put_local_resources(dd);
mutex_unlock(&dd->core_lock);
pm_runtime_mark_last_busy(dd->dev);
pm_runtime_put_autosuspend(dd->dev);
}
@ -2616,6 +2627,7 @@ static int msm_spi_pm_suspend_runtime(struct device *device)
wait_event_interruptible(dd->continue_suspend,
!dd->transfer_pending);
mutex_lock(&dd->core_lock);
if (dd->pdata && !dd->pdata->is_shared && dd->use_dma) {
msm_spi_bam_pipe_disconnect(dd, &dd->bam.prod);
msm_spi_bam_pipe_disconnect(dd, &dd->bam.cons);
@ -2625,6 +2637,7 @@ static int msm_spi_pm_suspend_runtime(struct device *device)
if (dd->pdata)
msm_spi_clk_path_vote(dd, 0);
mutex_unlock(&dd->core_lock);
suspend_exit:
return 0;