From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20071004112834.252620858@de.ibm.com> References: <20071004112706.574737175@de.ibm.com> Date: Thu, 04 Oct 2007 13:27:39 +0200 From: Martin Schwidefsky Subject: [patch 33/34] tape: Fix medium state handling Content-Disposition: inline; filename=033-tape-state.diff Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Michael Holzheu , Martin Schwidefsky List-ID: From: Michael Holzheu Currently there are situations, where the tape medium state (loaded, unloaded, unknown) is not set correctly. The reason is that the medium association field is used to determine the medium state. This not always leads to correct results. To fix that we use another field of the medium sense data instead. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- drivers/s390/char/tape_3590.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) Index: quilt-2.6/drivers/s390/char/tape_3590.c =================================================================== --- quilt-2.6.orig/drivers/s390/char/tape_3590.c +++ quilt-2.6/drivers/s390/char/tape_3590.c @@ -713,16 +713,22 @@ static void tape_3590_med_state_set(stru c_info = &TAPE_3590_CRYPT_INFO(device); - if (sense->masst == MSENSE_UNASSOCIATED) { + DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); + switch (sense->macst) { + case 0x04: + case 0x05: + case 0x06: tape_med_state_set(device, MS_UNLOADED); TAPE_3590_CRYPT_INFO(device).medium_status = 0; return; - } - if (sense->masst != MSENSE_ASSOCIATED_MOUNT) { - PRINT_ERR("Unknown medium state: %x\n", sense->masst); + case 0x08: + case 0x09: + tape_med_state_set(device, MS_LOADED); + break; + default: + tape_med_state_set(device, MS_UNKNOWN); return; } - tape_med_state_set(device, MS_LOADED); c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; if (sense->flags & MSENSE_CRYPT_MASK) { PRINT_INFO("Medium is encrypted (%04x)\n", sense->flags); @@ -840,15 +846,17 @@ tape_3590_unsolicited_irq(struct tape_de /* Probably result of halt ssch */ return TAPE_IO_PENDING; else if (irb->scsw.dstat == 0x85) - /* Device Ready -> check medium state */ - tape_3590_schedule_work(device, TO_MSEN); - else if (irb->scsw.dstat & DEV_STAT_ATTENTION) + /* Device Ready */ + DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); + else if (irb->scsw.dstat & DEV_STAT_ATTENTION) { tape_3590_schedule_work(device, TO_READ_ATTMSG); - else { + } else { DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); PRINT_WARN("Unsolicited IRQ (Device End) caught.\n"); tape_dump_sense(device, NULL, irb); } + /* check medium state */ + tape_3590_schedule_work(device, TO_MSEN); return TAPE_IO_SUCCESS; } -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.