svec-fmc: provide fake null EEPROM for empty slots

This kludge is made to cheat the fmc-bus into the belief that a valid EEPROM with no FRU information was read, given that FMC_DEVICE_NO_MEZZANINE is not used in it.

svec-fmc: provide fake null EEPROM for empty slots
This kludge is made to cheat the fmc-bus into the belief that a valid EEPROM with no FRU information was read, given that FMC_DEVICE_NO_MEZZANINE is not used in it.
95a811a4 · Juan David González Cobas · a86fe4f3 · 95a811a4
Commit 95a811a4 authored May 16, 2013 by Juan David González Cobas
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svec-fmc.c kernel/svec-fmc.c +10 -0

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--- a/kernel/svec-fmc.c
+++ b/kernel/svec-fmc.c
@@ -235,6 +235,8 @@ int svec_fmc_prepare(struct svec_dev *svec, unsigned int fmc_slot)
 	return ret;
 }

+static uint8_t svec_void_eeprom[10];
+
 int svec_fmc_create(struct svec_dev *svec)
 {
 	int i;
@@ -245,6 +247,14 @@ int svec_fmc_create(struct svec_dev *svec)
 		error = svec_fmc_prepare(svec, i);
 		if (error)
 			goto failed;
+		/* FIXME: this kludge must be replaced by a
+		 * proper copy from a template; all this code
+		 * is badly broken */
+		if (svec->fmcs[i]->flags & FMC_DEVICE_NO_MEZZANINE) {
+			svec->fmcs[i]->eeprom = svec_void_eeprom;
+			svec->fmcs[i]->eeprom_len = sizeof(svec_void_eeprom);
+			svec->fmcs[i]->eeprom_addr = 0xff;
+		}
 	}

 	/* fmc device creation */