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-rw-r--r--drivers/block/nvme-core.c26
-rw-r--r--include/linux/nvme.h2
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 1595ffba8a6..23bb5a70d81 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -1221,6 +1221,30 @@ static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap)
return nvme_wait_ready(dev, cap, true);
}
+static int nvme_shutdown_ctrl(struct nvme_dev *dev)
+{
+ unsigned long timeout;
+ u32 cc;
+
+ cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL;
+ writel(cc, &dev->bar->cc);
+
+ timeout = 2 * HZ + jiffies;
+ while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) !=
+ NVME_CSTS_SHST_CMPLT) {
+ msleep(100);
+ if (fatal_signal_pending(current))
+ return -EINTR;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&dev->pci_dev->dev,
+ "Device shutdown incomplete; abort shutdown\n");
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
static int nvme_configure_admin_queue(struct nvme_dev *dev)
{
int result;
@@ -1943,6 +1967,8 @@ static void nvme_dev_shutdown(struct nvme_dev *dev)
list_del_init(&dev->node);
spin_unlock(&dev_list_lock);
+ if (dev->bar)
+ nvme_shutdown_ctrl(dev);
nvme_dev_unmap(dev);
}
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 3403c8f06fa..26ebcf41c21 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -53,6 +53,7 @@ enum {
NVME_CC_SHN_NONE = 0 << 14,
NVME_CC_SHN_NORMAL = 1 << 14,
NVME_CC_SHN_ABRUPT = 2 << 14,
+ NVME_CC_SHN_MASK = 3 << 14,
NVME_CC_IOSQES = 6 << 16,
NVME_CC_IOCQES = 4 << 20,
NVME_CSTS_RDY = 1 << 0,
@@ -60,6 +61,7 @@ enum {
NVME_CSTS_SHST_NORMAL = 0 << 2,
NVME_CSTS_SHST_OCCUR = 1 << 2,
NVME_CSTS_SHST_CMPLT = 2 << 2,
+ NVME_CSTS_SHST_MASK = 3 << 2,
};
#define NVME_VS(major, minor) (major << 16 | minor)