[flashrom] [PATCH] Improve error messages, protect the user

[Carl-Daniel Hailfinger]

On 12.08.2009 11:39, Stefan Reinauer wrote:
> On 8/11/09 5:25 PM, Carl-Daniel Hailfinger wrote:
>   
>> +		if (flash->tested & TEST_BAD_ERASE) {
>> +			fprintf(stderr, "Erase is not working on this chip "
>> +				"and erase is needed for write. Aborting.\n");
>> +			return 1;
>> +		}
>> +		if (flash->tested & TEST_BAD_WRITE) {
>> +			fprintf(stderr, "Write is not working on this chip. "
>> +				"Aborting.\n");
>> +			return 1;
>> +		}
>>   
>>     
>
> I would agree to this as long as there's a --force option
>   

Updated patch attached.

> I think the IRC note should go to the documentation, not the code.
>   

Looking at the experience of most failed flashes where the users came to
us after it was too late or rebooted directly after joining IRC, I'd say
directing them with a program message to a realtime support channel
instead of some piece of text in the documentation is the right way to
go. After all, quite a few distro packages do not install the README.

New version:
- Allow BAD override with --force
- Wait 1 second between erase and verify. This fixes a few reports where
verify directly after erase had unpleasant side effects like corrupting
flash or at least getting incorrect verify results.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>

Index: flashrom-errormessages/flashrom.c
===================================================================
--- flashrom-errormessages/flashrom.c	(Revision 678)
+++ flashrom-errormessages/flashrom.c	(Arbeitskopie)
@@ -222,6 +222,7 @@
 {
 	size_t size = flash->total_size * 1024;
 	/* Flash registers live 4 MByte below the flash. */
+	/* FIXME: This is incorrect for nonstandard flashbase. */
 	flash->virtual_registers = (chipaddr)programmer_map_flash_region("flash chip registers", (0xFFFFFFFF - 0x400000 - size + 1), size);
 }
 
@@ -476,6 +477,15 @@
 	return 0;
 }
 
+void emergency_help_message()
+{
+	fprintf(stderr, "Your flash chip is in an unknown state.\n"
+		"Get help on IRC at irc.freenode.net channel #flashrom or\n"
+		"mail flashrom at flashrom.org\n"
+		"------------------------------------------------------------\n"
+		"DO NOT REBOOT OR POWEROFF!\n");
+}
+
 void usage(const char *name)
 {
 	printf("usage: %s [-VfLzhR] [-E|-r file|-w file|-v file] [-c chipname]\n"
@@ -744,6 +754,7 @@
 				printf("Run flashrom -L to view the hardware supported in this flashrom version.\n");
 				exit(1);
 			}
+			printf("Please note that forced reads most likely contain garbage.\n");
 			return read_flash(flashes[0], filename);
 		}
 		// FIXME: flash writes stay enabled!
@@ -809,14 +820,44 @@
 	buf = (uint8_t *) calloc(size, sizeof(char));
 
 	if (erase_it) {
-		if (erase_flash(flash))
+		if (flash->tested & TEST_BAD_ERASE) {
+			fprintf(stderr, "Erase is not working on this chip. ");
+			if (!force) {
+				fprintf(stderr, "Aborting.\n");
+				return 1;
+			} else {
+				fprintf(stderr, "Continuing anyway.\n");
+			}
+		}
+		if (erase_flash(flash)) {
+			emergency_help_message();
 			return 1;
+		}
 	} else if (read_it) {
 		if (read_flash(flash, filename))
 			return 1;
 	} else {
 		struct stat image_stat;
 
+		if (flash->tested & TEST_BAD_ERASE) {
+			fprintf(stderr, "Erase is not working on this chip "
+				"and erase is needed for write. ");
+			if (!force) {
+				fprintf(stderr, "Aborting.\n");
+				return 1;
+			} else {
+				fprintf(stderr, "Continuing anyway.\n");
+			}
+		}
+		if (flash->tested & TEST_BAD_WRITE) {
+			fprintf(stderr, "Write is not working on this chip. ");
+			if (!force) {
+				fprintf(stderr, "Aborting.\n");
+				return 1;
+			} else {
+				fprintf(stderr, "Continuing anyway.\n");
+			}
+		}
 		if ((image = fopen(filename, "r")) == NULL) {
 			perror(filename);
 			exit(1);
@@ -855,14 +896,21 @@
 		ret = flash->write(flash, buf);
 		if (ret) {
 			fprintf(stderr, "FAILED!\n");
+			emergency_help_message();
 			return 1;
 		} else {
 			printf("COMPLETE.\n");
 		}
 	}
 
-	if (verify_it)
+	if (verify_it) {
+		/* Work around chips which need some time to calm down. */
+		if (write_it)
+			programmer_delay(1000*1000);
 		ret = verify_flash(flash, buf);
+		if (ret)
+			emergency_help_message();
+	}
 
 	programmer_shutdown();
 


-- 
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