[PATCH 06/10] s390/dasd: Store path configuration data during path handling
From: Stefan Haberland <sth@linux.ibm.com>
Date: 2020-10-02 19:39:49
Also in:
linux-s390
Subsystem:
s390 architecture, s390 dasd driver, the rest · Maintainers:
Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Stefan Haberland, Jan Hoeppner, Linus Torvalds
From: Jan Höppner <hoeppner@linux.ibm.com> Currently, the configuration data for a path is retrieved during a path verification and used only temporarily. If a path is newly added to the I/O setup after a boot, no configuration data will be stored for this particular path. However, this data is required for later use and should be present for a valid I/O path anyway. Store this data during the path verification so that newly added paths can provide all information necessary. Reference-ID: IO1812 Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Stefan Haberland <sth@linux.ibm.com> --- drivers/s390/block/dasd_eckd.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 497aa81778b6..274f79869b7c 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c@@ -1263,9 +1263,10 @@ static void do_path_verification_work(struct work_struct *work) struct dasd_uid *uid; __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; + struct dasd_conf_data *conf_data; unsigned long flags; char print_uid[60]; - int rc; + int rc, pos; data = container_of(work, struct path_verification_work_data, worker); device = data->device;
@@ -1395,6 +1396,14 @@ static void do_path_verification_work(struct work_struct *work) } } + conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); + if (conf_data) { + memcpy(conf_data, data->rcd_buffer, + DASD_ECKD_RCD_DATA_SIZE); + } + pos = pathmask_to_pos(lpm); + dasd_eckd_store_conf_data(device, conf_data, pos); + /* * There is a small chance that a path is lost again between * above path verification and the following modification of
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2.17.1