From: Diego Elio Pettenò Date: Tue, 19 Nov 2019 21:37:09 +0000 (+0000) Subject: sr_vendor: support Beurer GL50 evo CD-on-a-chip devices. X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=396bbe1427828be1025fb052b7e04b42f421352d;p=linux.git sr_vendor: support Beurer GL50 evo CD-on-a-chip devices. 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 Cc: linux-kernel@vger.kernel.org Cc: linux-scsi@vger.kernel.org Signed-off-by: Diego Elio Pettenò Signed-off-by: Jens Axboe --- diff --git a/drivers/scsi/sr_vendor.c b/drivers/scsi/sr_vendor.c index e3b0ce25162ba..17a56c87d383a 100644 --- a/drivers/scsi/sr_vendor.c +++ b/drivers/scsi/sr_vendor.c @@ -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 }