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Commit 9535fff3 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Christoph Hellwig
Browse files

esp_scsi: read status registers 



A read to ESP_INTRPT will clear ESP_STATUS and ESP_SSTEP. So read
all status registers in one go to avoid losing information.

Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 1af6f603

drivers/scsi/esp_scsi.c

+5 −3
Original line number Diff line number Diff line
@@ -982,7 +982,6 @@ static int esp_check_spur_intr(struct esp *esp) 


	default:

		if (!(esp->sreg & ESP_STAT_INTR)) {

			esp->ireg = esp_read8(ESP_INTRPT);

			if (esp->ireg & ESP_INTR_SR)

				return 1;
@@ -2056,7 +2055,12 @@ static void __esp_interrupt(struct esp *esp) 
	int finish_reset, intr_done;

	u8 phase;



       /*

	* Once INTRPT is read STATUS and SSTEP are cleared.

	*/

	esp->sreg = esp_read8(ESP_STATUS);

	esp->seqreg = esp_read8(ESP_SSTEP);

	esp->ireg = esp_read8(ESP_INTRPT);



	if (esp->flags & ESP_FLAG_RESETTING) {

		finish_reset = 1;
@@ -2069,8 +2073,6 @@ static void __esp_interrupt(struct esp *esp) 
			return;

	}



	esp->ireg = esp_read8(ESP_INTRPT);



	if (esp->ireg & ESP_INTR_SR)

		finish_reset = 1;