From 683fc444697a388f17cbc3bd7e64191ce000b6b4 Mon Sep 17 00:00:00 2001 From: Don Brace Date: Wed, 4 Nov 2015 15:50:44 -0600 Subject: [PATCH] hpsa: abandon rescans on memory alloaction failures. Abandon and reschedule rescan process only if device inquiries fail due to mem alloc failures, which are likely to occur for all devices. Otherwise, skip device if inquiry fails for other reasons, and continue rescanning process for other devices. Reviewed-by: Scott Teel Reviewed-by: Justin Lindley Reviewed-by: Kevin Barnett Reviewed-by: Tomas Henzl Signed-off-by: Don Brace Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen --- drivers/scsi/hpsa.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index f010b8ec1a20..ce0341a178fd 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -3366,10 +3366,13 @@ static int hpsa_update_device_info(struct ctlr_info *h, unsigned char *inq_buff; unsigned char *obdr_sig; + int rc = 0; inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); - if (!inq_buff) + if (!inq_buff) { + rc = -ENOMEM; goto bail_out; + } /* Do an inquiry to the device to see what it is. */ if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, @@ -3377,6 +3380,7 @@ static int hpsa_update_device_info(struct ctlr_info *h, /* Inquiry failed (msg printed already) */ dev_err(&h->pdev->dev, "hpsa_update_device_info: inquiry failed\n"); + rc = -EIO; goto bail_out; } @@ -3426,7 +3430,7 @@ static int hpsa_update_device_info(struct ctlr_info *h, bail_out: kfree(inq_buff); - return 1; + return rc; } static void hpsa_update_device_supports_aborts(struct ctlr_info *h, @@ -3794,6 +3798,7 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h) n_ext_target_devs = 0; for (i = 0; i < nphysicals + nlogicals + 1; i++) { u8 *lunaddrbytes, is_OBDR = 0; + int rc = 0; /* Figure out where the LUN ID info is coming from */ lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position, @@ -3806,11 +3811,20 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h) continue; /* Get device type, vendor, model, device id */ - if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice, - &is_OBDR)) { + rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice, + &is_OBDR); + if (rc == -ENOMEM) { + dev_warn(&h->pdev->dev, + "Out of memory, rescan deferred.\n"); h->drv_req_rescan = 1; - continue; /* skip it if we can't talk to it. */ + goto out; } + if (rc) { + dev_warn(&h->pdev->dev, + "Inquiry failed, skipping device.\n"); + continue; + } + figure_bus_target_lun(h, lunaddrbytes, tmpdevice); hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes); this_device = currentsd[ncurrent]; -- 2.20.1