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diff -up hdparm-9.60/sgio.c.bak hdparm-9.60/sgio.c
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--- hdparm-9.60/sgio.c.bak 2019-01-03 23:37:54.000000000 +0100
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+++ hdparm-9.60/sgio.c 2021-04-07 16:10:36.971836569 +0200
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@@ -17,6 +17,10 @@
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#include <linux/hdreg.h>
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+#ifndef DEMAND_SENSE_DATA
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+ #define DEMAND_SENSE_DATA 0
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+#endif
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+
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extern int verbose;
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extern int prefer_ata12;
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@@ -193,7 +197,7 @@ int sg16 (int fd, int rw, int dma, struc
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unsigned char cdb[SG_ATA_16_LEN];
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unsigned char sb[32], *desc;
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struct scsi_sg_io_hdr io_hdr;
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- int prefer12 = prefer_ata12, demanded_sense = 0;
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+ int prefer12 = prefer_ata12;
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if (tf->command == ATA_OP_PIDENTIFY)
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prefer12 = 0;
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@@ -306,14 +310,16 @@ int sg16 (int fd, int rw, int dma, struc
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desc = sb + 8;
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if (io_hdr.driver_status != SG_DRIVER_SENSE) {
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- if (sb[0] | sb[1] | sb[2] | sb[3] | sb[4] | sb[5] | sb[6] | sb[7] | sb[8] | sb[9]) {
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- static int second_try = 0;
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- if (!second_try++)
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+ static int second_try = 0;
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+ if (!second_try++) {
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+ if (sb[0] | sb[1] | sb[2] | sb[3] | sb[4] | sb[5] | sb[6] | sb[7] | sb[8] | sb[9]) {
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fprintf(stderr, "SG_IO: questionable sense data, results may be incorrect\n");
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- } else if (demanded_sense) {
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- static int second_try = 0;
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- if (!second_try++)
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+ }
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+#if DEMAND_SENSE_DATA
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+ else {
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fprintf(stderr, "SG_IO: missing sense data, results may be incorrect\n");
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+ }
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+#endif
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}
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} else if (sb[0] != 0x72 || sb[7] < 14 || desc[0] != 0x09 || desc[1] < 0x0c) {
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if (verbose || tf->command != ATA_OP_IDENTIFY)
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