sr_vendor: support Beurer GL50 evo CD-on-a-chip devices. (396bbe14) · Commits · 戴 / test

The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip that only accepts a subset of SCSI commands, and supports neither audio commands nor generic packet commands. Actually sending those commands bring the device to an unrecoverable state that causes the device to hang and reset. To: Jens Axboe <axboe@kernel.dk> Cc: linux-kernel@vger.kernel.org Cc: linux-scsi@vger.kernel.org Signed-off-by:

Diego Elio Pettenò <flameeyes@flameeyes.com> Signed-off-by:

Jens Axboe <axboe@kernel.dk>

drivers/scsi/sr_vendor.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -61,6 +61,7 @@
		#define VENDOR_NEC 2
		#define VENDOR_TOSHIBA 3
		#define VENDOR_WRITER 4 /* pre-scsi3 writers */
		#define VENDOR_CYGNAL_85ED 5 /* CD-on-a-chip */

		#define VENDOR_TIMEOUT 30*HZ

		@@ -99,6 +100,23 @@ void sr_vendor_init(Scsi_CD *cd)
		} else if (!strncmp(vendor, "TOSHIBA", 7)) {
		cd->vendor = VENDOR_TOSHIBA;

		} else if (!strncmp(vendor, "Beurer", 6) &&
		!strncmp(model, "Gluco Memory", 12)) {
		/* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip
		that only accepts a subset of SCSI commands. Most of the
		not-implemented commands are fine to fail, but a few,
		particularly around the MMC or Audio commands, will put the
		device into an unrecoverable state, so they need to be
		avoided at all costs.
		*/
		cd->vendor = VENDOR_CYGNAL_85ED;
		cd->cdi.mask \|= (
		CDC_MULTI_SESSION \|
		CDC_CLOSE_TRAY \| CDC_OPEN_TRAY \|
		CDC_LOCK \|
		CDC_GENERIC_PACKET \|
		CDC_PLAY_AUDIO
		);
		}
		#endif
		}

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