File s390-tools-sles15sp2-01-zpcictl-Initiate-recove... of Package s390-tools

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File s390-tools-sles15sp2-01-zpcictl-Initiate-recover-after-reset.patch of Package s390-tools

Subject: [PATCH] [BZ 184174] zpcictl: Initiate recover after reset
From: Jan Hoeppner <hoeppner@linux.ibm.com>

Description:   zpcictl: Initiate recover after reset
Symptom:       If a PCI function is reset using zpcictl --reset, the function
               is in an error state.
Problem:       zpcictl --reset only issues a SCLP reset and leaves the PCI
               function in an error state.
Solution:      Initiate an OS level recovery by calling
               /sys/bus/devices/<dev>/recover after the SCLP reset.
Reproduction:  Call zpcictl --reset <dev>
               Under z/VM check the state of the function with 'vmcp q pcif'
Upstream-ID:   bc0d40c5803d4c5426b17b6d59aa0f1e46a2aacc
Problem-ID:    184174

Upstream-Description:

zpcictl: Initiate recover after reset

After a zpcitctl --reset the PCI function is currently left in an error
              state. This seems unexpected, so follow the SCLP reset with an OS level
              recovery using /sys/bus/devices/<dev>/recover.

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
              Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
              Signed-off-by: Jan Hoeppner <hoeppner@linux.ibm.com>

Signed-off-by: Jan Hoeppner <hoeppner@linux.ibm.com>
---
 zpcictl/zpcictl.c |   21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

--- a/zpcictl/zpcictl.c
+++ b/zpcictl/zpcictl.c
@@ -163,6 +163,26 @@ static unsigned int sysfs_read_value(str
 	return val;
 }
 
+static void sysfs_write_value(struct zpci_device *pdev, const char *attr,
+				unsigned int val)
+{
+	char *path;
+	FILE *fp;
+
+	path = util_path_sysfs("bus/pci/devices/%s/%s", pdev->slot, attr);
+	fp = fopen(path, "w");
+	if (!fp)
+		fopen_err(path);
+	if (fprintf(fp, "%x", val) < 0) {
+		fclose(fp);
+		warnx("Could not write to file %s: %s", path, strerror(errno));
+		free(path);
+		exit(EXIT_FAILURE);
+	}
+	fclose(fp);
+	free(path);
+}
+
 static void sysfs_write_data(struct zpci_report_error *report, char *slot)
 {
 	size_t r_size;
@@ -297,6 +317,7 @@ static void sclp_issue_action(struct zpc
 static void sclp_reset_device(struct zpci_device *pdev)
 {
 	sclp_issue_action(pdev, SCLP_ERRNOTIFY_AQ_RESET);
+	sysfs_write_value(pdev, "recover", 1);
 }
 
 /*

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File s390-tools-sles15sp2-01-zpcictl-Initiate-recover-after-reset.patch of Package s390-tools

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