From 906e4a3c7e03701008d343daec8952d6cf49f82b Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Mon, 5 Dec 2016 01:07:20 -0500 Subject: scsi: g_NCR5380: Use probe_irq_*() for IRQ probing Use standard probe_irq_on() and probe_irq_off() functions instead of own implementation. This prevents warning messages like this in the kernel log: genirq: Flags mismatch irq 1. 00000000 (NCR-probe) vs. 00000080 (i8042) Move the IRQ trigger code from NCR5380 to g_NCR5380 where it is used. Also clear interrupt flag before and after the probe. Signed-off-by: Ondrej Zary Signed-off-by: Finn Thain Tested-by: Ondrej Zary Signed-off-by: Martin K. Petersen --- drivers/scsi/NCR5380.c | 77 +------------------------------------------------- 1 file changed, 1 insertion(+), 76 deletions(-) (limited to 'drivers/scsi/NCR5380.c') diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index d849ffa378b1..4f5ca794bb71 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -97,9 +97,6 @@ * and macros and include this file in your driver. * * These macros control options : - * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be - * defined. - * * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically * for commands that return with a CHECK CONDITION status. * @@ -127,9 +124,7 @@ * NCR5380_dma_residual - residual byte count * * The generic driver is initialized by calling NCR5380_init(instance), - * after setting the appropriate host specific fields and ID. If the - * driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance, - * possible) function may be used. + * after setting the appropriate host specific fields and ID. */ #ifndef NCR5380_io_delay @@ -351,76 +346,6 @@ static void NCR5380_print_phase(struct Scsi_Host *instance) } #endif - -static int probe_irq; - -/** - * probe_intr - helper for IRQ autoprobe - * @irq: interrupt number - * @dev_id: unused - * @regs: unused - * - * Set a flag to indicate the IRQ in question was received. This is - * used by the IRQ probe code. - */ - -static irqreturn_t probe_intr(int irq, void *dev_id) -{ - probe_irq = irq; - return IRQ_HANDLED; -} - -/** - * NCR5380_probe_irq - find the IRQ of an NCR5380 - * @instance: NCR5380 controller - * @possible: bitmask of ISA IRQ lines - * - * Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ - * and then looking to see what interrupt actually turned up. - */ - -static int __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance, - int possible) -{ - struct NCR5380_hostdata *hostdata = shost_priv(instance); - unsigned long timeout; - int trying_irqs, i, mask; - - for (trying_irqs = 0, i = 1, mask = 2; i < 16; ++i, mask <<= 1) - if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0)) - trying_irqs |= mask; - - timeout = jiffies + msecs_to_jiffies(250); - probe_irq = NO_IRQ; - - /* - * A interrupt is triggered whenever BSY = false, SEL = true - * and a bit set in the SELECT_ENABLE_REG is asserted on the - * SCSI bus. - * - * Note that the bus is only driven when the phase control signals - * (I/O, C/D, and MSG) match those in the TCR, so we must reset that - * to zero. - */ - - NCR5380_write(TARGET_COMMAND_REG, 0); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL); - - while (probe_irq == NO_IRQ && time_before(jiffies, timeout)) - schedule_timeout_uninterruptible(1); - - NCR5380_write(SELECT_ENABLE_REG, 0); - NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - - for (i = 1, mask = 2; i < 16; ++i, mask <<= 1) - if (trying_irqs & mask) - free_irq(i, NULL); - - return probe_irq; -} - /** * NCR58380_info - report driver and host information * @instance: relevant scsi host instance -- cgit v1.2.3